Die structure design method and equipment for household appliance metal plate and storage medium

Abstract

The invention belongs to the technical field of metal plate forming and manufacturing, and discloses a mold structure design method and equipment for household appliance metal plates and a storage medium. The method comprises the following steps: determining a target forming feature of a household appliance metal plate; determining the total similarity between the household appliance metal plate and a plurality of metal plate products in a knowledge retrieval library according to the target forming characteristics; retrieving a target metal plate product from the knowledge retrieval library according to the overall similarity; and designing a mold structure of the household appliance metal plate according to the mold processing information of the target metal plate product. In this way, the design and manufacturing efficiency of household appliance metal plates can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal forming manufacturing, and particularly to a method, device and storage medium for designing a die structure of household appliance sheet metal. Background Art

[0002] The traditional design and manufacturing process of household appliance sheet metal relies on personal knowledge and experience. However, personal knowledge and experience are stored in each person's brain, which only enables the reuse of knowledge for sheet metal design relying on personal experience, resulting in low efficiency in the design and manufacturing of household appliance sheet metal. Summary of the Invention

[0003] The main object of the present invention is to provide a method, device and storage medium for designing a die structure of household appliance sheet metal, aiming to solve the technical problem that the traditional design and manufacturing process of household appliance sheet metal only relies on personal experience for knowledge reuse in sheet metal design, resulting in low efficiency in the design and manufacturing of household appliance sheet metal.

[0004] To achieve the above object, the present invention provides a method for designing a die structure of household appliance sheet metal, the method comprising the following steps:

[0005] Determine the target forming features of the household appliance sheet metal;

[0006] Determine the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features;

[0007] Retrieve the target sheet metal product from the knowledge retrieval library according to the overall similarity;

[0008] Design the die structure of the household appliance sheet metal according to the die processing information of the target sheet metal product.

[0009] Optionally, the determining of the forming features of the household appliance sheet metal includes:

[0010] Determine the structural classification of the household appliance sheet metal;

[0011] When the structural classification is non-forming type, determine the target forming features of the household appliance sheet metal as drawing, bending, flanging, punching and local forming, wherein the non-forming type includes symmetric type, rectangular asymmetric type and circular asymmetric type;

[0012] When the structural classification is forming type, determine the target forming features of the household appliance sheet metal as bending, flanging, punching and local forming.

[0013] Optionally, before determining the target forming features of the household appliance sheet metal, it includes:

[0014] Obtain the forming features of multiple sheet metal products;

[0015] Extract the key parameters of the formed feature;

[0016] Determine the feature expression of the sheet metal product according to the key parameters;

[0017] Construct a knowledge retrieval library according to the feature expressions of multiple sheet metal products.

[0018] Optionally, the determining the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target formed feature includes:

[0019] Determine the target feature expression of the target formed feature;

[0020] Retrieve the feature expressions of sheet metal products from the knowledge retrieval library;

[0021] Based on the target feature expression and the feature expressions, determine the similarity of the formed features between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library;

[0022] Determine the overall similarity according to the similarity of the formed features.

[0023] Optionally, the target formed feature includes at least one of drawing, bending, flanging, punching, and local forming; wherein,

[0024] The determining the target feature expression of the target formed feature includes:

[0025] When there is drawing in the target formed feature, determine the drawing feature expression according to the section line parameters and the die splitting parameters;

[0026] When there is bending in the target formed feature, determine the bending feature expression according to the bending parameters;

[0027] When there is flanging in the target formed feature, determine the flanging feature expression according to the flanging parameters;

[0028] When there is punching in the target formed feature, determine the punching feature expression according to the punching parameters;

[0029] When there is local forming in the target formed feature, determine the local forming feature expression according to the local forming feature;

[0030] According to the drawing feature expression, the bending feature expression, the flanging feature expression, the punching feature expression, and the local forming feature expression, determine the target feature expression.

[0031] Optionally, the section line parameters include the section line height, the section line draft angle, and the section line width, and the die splitting parameters include the straight edge fillet radius, the horizontal direction stretching dimension, and the vertical direction stretching dimension; wherein,

[0032] Determining the drawing feature expression according to the section line parameters and the die splitting parameters includes:

[0033] Constructing a section line parameter matrix model according to the section line height, the section line draft angle, and the section line width;

[0034] Constructing a die splitting parameter matrix model according to the straight edge fillet radius, the stretching dimension in the horizontal direction, and the stretching dimension in the vertical direction;

[0035] Determining the drawing feature expression according to the section line parameter matrix model and the die splitting parameter matrix model.

[0036] Optionally, the bending parameters include the maximum number of bends, the bending angle, and the bending height, and the flanging parameters include the flanging type, the forming method, the flanging height, the flanging angle, and the section angle; wherein,

[0037] Determining the bending feature expression according to the bending parameters includes:

[0038] Determining the bending feature expression according to the maximum number of bends, the bending angle, and the bending height;

[0039] Determining the flanging feature expression according to the flanging parameters includes:

[0040] Determining the flanging feature expression according to the flanging type, the forming method, the flanging height, the flanging angle, and the section angle.

[0041] Optionally, determining the overall similarity according to the similarity of the forming features includes:

[0042] Determining the basic similarity according to the comparison results of the part materials and the overall features between the household appliance sheet metal and the sheet metal products;

[0043] Determining the product similarity according to the sheet metal processing procedures between the household appliance sheet metal and the sheet metal products;

[0044] Determining the overall similarity based on the basic similarity, the product similarity, and the similarity of the forming features.

[0045] In addition, to achieve the above object, the present invention also proposes a die structure design device for household appliance sheet metal, and the die structure design device for household appliance sheet metal includes:

[0046] A determining module, configured to determine the target forming features of the household appliance sheet metal;

[0047] The determining module is further configured to determine the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features;

[0048] A retrieval module, configured to retrieve a target sheet metal product from the knowledge retrieval library according to the overall similarity.

[0049] A design module, configured to design the die structure of the household appliance sheet metal according to the die processing information of the target sheet metal product.

[0050] In addition, to achieve the above object, the present invention further provides a device for designing a die structure of a household appliance sheet metal. The device for designing a die structure of a household appliance sheet metal includes: a memory, a processor, and a program for designing a die structure of a household appliance sheet metal stored on the memory and executable on the processor. The program for designing a die structure of a household appliance sheet metal is configured to implement the steps of the method for designing a die structure of a household appliance sheet metal as described above.

[0051] In addition, to achieve the above object, the present invention further provides a storage medium. A program for designing a die structure of a household appliance sheet metal is stored on the storage medium. When the program for designing a die structure of a household appliance sheet metal is executed by a processor, the steps of the method for designing a die structure of a household appliance sheet metal as described above are implemented.

[0052] The method, device, and storage medium for designing a die structure of a household appliance sheet metal proposed by the present invention determine the target forming features of the household appliance sheet metal; determine the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features; retrieve a target sheet metal product from the knowledge retrieval library according to the overall similarity; and design the die structure of the household appliance sheet metal according to the die processing information of the target sheet metal product. By the above method, the forming features of the household appliance sheet metal are compared with the forming features of the sheet metal products in the knowledge retrieval library to determine the overall similarity between the household appliance sheet metal and each sheet metal product in the knowledge retrieval library, and the sheet metal product corresponding to the household appliance sheet metal is determined according to the overall similarity, so as to call the die processing information of the sheet metal product from the knowledge retrieval library to drive the die design of the household appliance sheet metal, making the die design of the household appliance sheet metal no longer rely on personal experience, thereby improving the efficiency of die design and manufacturing of the household appliance sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic structural diagram of a device for designing a die structure of a household appliance sheet metal in a hardware operating environment related to the embodiment solution of the present invention;

[0054] Figure 2 is a schematic flowchart of the first embodiment of the method for designing a die structure of a household appliance sheet metal of the present invention;

[0055] Figure 3 is a specific flowchart of determining the overall similarity in the first embodiment of the method for designing a die structure of a household appliance sheet metal of the present invention;

[0056] Figure 4 Schematic flow chart of the second embodiment of the mold structure design method for home appliance sheet metal according to the present invention;

[0057] Figure 5 Schematic diagram of the structure of home appliance sheet metal in the second embodiment of the mold structure design method for home appliance sheet metal according to the present invention;

[0058] Figure 6 Schematic diagram of cross-sectional line parameters in the second embodiment of the mold structure design method for home appliance sheet metal according to the present invention;

[0059] Figure 7 Schematic diagram of die-splitting parameters in the second embodiment of the mold structure design method for home appliance sheet metal according to the present invention;

[0060] Figure 8 Block diagram of the structure of the first embodiment of the mold structure design device for home appliance sheet metal according to the present invention.

[0061] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0062] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0063] Refer to Figure 1 , Figure 1 Schematic diagram of the structure of the mold structure design device for home appliance sheet metal in the hardware operating environment related to the embodiment solution of the present invention.

[0064] As Figure 1 shown, the mold structure design device for home appliance sheet metal may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and optionally the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless-fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0065] Those skilled in the art can understand that Figure 1 the structure shown in Figure 1 does not constitute a limitation on the die structure design device for home appliance sheet metal, and may include more or fewer components than those shown, or combine certain components, or have different component arrangements.

[0066] As Figure 1 shown, in the memory 1005 as a storage medium, there may be included an operating system, a network communication module, a user interface module, and a die structure design program for home appliance sheet metal.

[0067] In Figure 1 the die structure design device for home appliance sheet metal shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the die structure design device of the present invention can be arranged in the die structure design device for home appliance sheet metal. The die structure design device for home appliance sheet metal calls the die structure design program stored in the memory 1005 through the processor 1001, and executes the die structure design method provided by the embodiments of the present invention.

[0068] Based on the above hardware structure, an embodiment of the die structure design method for home appliance sheet metal of the present invention is proposed.

[0069] Referring to Figure 2 , Figure 2 FIG.

[0070] In this embodiment, the die structure design method for home appliance sheet metal includes the following steps:

[0071] Step S10: Determine the target forming features of the home appliance sheet metal.

[0072] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a mobile phone, a tablet computer, a personal computer, etc., or an electronic device or a die structure design device for home appliance sheet metal that can implement the above functions. Hereinafter, the die structure design device for home appliance sheet metal will be taken as an example to illustrate this embodiment and the following embodiments.

[0073] It should be noted that the target forming features mainly include stretching, flanging, bending, punching, and local forming. Among them, the difference between bending and flanging lies in whether there is significant plastic deformation of the material. During bending, there is no large plastic deformation of the material, while during flanging, there is plastic deformation of the material (it is necessary to distinguish between bending and flanging when studying the forming features); since the process routes of household appliance sheet metals under different structural classifications are different, the forming features of household appliance sheet metals under different structural classifications are also different. For example, the process route of the household appliance sheet metal of the symmetric type is: drawing (multiple times) - trimming - bending / flanging. Then, the forming features of the household appliance sheet metal of the symmetric type are drawing, bending, flanging, punching, and local forming (since local forming is required to locally process the material after each process step, the forming features of each type of household appliance sheet metal include local forming).

[0074] In one embodiment, determining the forming features of the household appliance sheet metal includes:

[0075] Determining the structural classification of the household appliance sheet metal;

[0076] When the structural classification is the non-forming type, determining the target forming features of the household appliance sheet metal as stretching, bending, flanging, punching, and local forming, where the non-forming type includes the symmetric type, rectangular asymmetric type, and circular asymmetric type;

[0077] When the structural classification is the forming type, determining the target forming features of the household appliance sheet metal as bending, flanging, punching, and local forming.

[0078] It should be noted that the structural classification of household appliance sheet metals includes the symmetric type, rectangular asymmetric type, circular asymmetric type, and forming type; since the structure of the household appliance sheet metal of the symmetric type is completely symmetric, the research method of the household appliance sheet metal of the symmetric type can take a part of it to represent the whole part. The household appliance sheet metal of the symmetric type can be the front flange of the washing machine, the door body of the microwave oven, etc.; the household appliance sheet metal of the rectangular asymmetric type refers to the household appliance sheet metal with a rectangular structure but an asymmetric structure. The research method of the household appliance sheet metal of the rectangular asymmetric type must take all four directions. The household appliance sheet metal of the rectangular asymmetric type can be the front panel of the air conditioner, the U-shaped plate of the microwave oven, etc.; the household appliance sheet metal of the circular asymmetric type refers to the household appliance sheet metal with a circular structure but an asymmetric structure. The research method of the household appliance sheet metal of the circular asymmetric type needs to select several parts according to the actual situation. The household appliance sheet metal of the circular asymmetric type can be the agitator of the washing machine, etc.; the household appliance sheet metal of the forming type refers to the household appliance sheet metal with a specific shape and structure. The household appliance sheet metal of the forming type can be the inner plate of the oven, the back panel of the refrigerator, etc.

[0079] In specific implementation, when the structural classification of the household appliance sheet metal is symmetric, its process route is drawing (multiple times) - trimming and punching - bending / flanging. Then, it can be determined that the forming features of the symmetric household appliance sheet metal are drawing, bending, flanging, punching, and local forming. When the structural classification of the household appliance sheet metal is rectangular asymmetric, its process route is drawing (multiple times) - trimming and punching - bending / flanging. Then, it can be determined that the forming features of the rectangular asymmetric household appliance sheet metal are drawing, bending, flanging, punching, and local forming. When the structural classification of the household appliance sheet metal is circular asymmetric, its process route is drawing (multiple times) - trimming and punching - bending / flanging. Then, it can be determined that the forming features of the rectangular asymmetric household appliance sheet metal are drawing, bending, flanging, punching, and local forming. When the structural classification of the household appliance sheet metal is forming type, its process route is trimming and punching - bending / flanging. Then, it can be determined that the forming features of the rectangular asymmetric household appliance sheet metal are bending, flanging, punching, and local forming.

[0080] In one embodiment, before determining the target forming features of the household appliance sheet metal, it includes:

[0081] Obtain the forming features of multiple sheet metal products;

[0082] Extract the key parameters of the forming features;

[0083] Determine the feature expression of the sheet metal product according to the key parameters;

[0084] Construct a knowledge retrieval library according to the feature expressions of multiple sheet metal products.

[0085] It should be noted that the knowledge retrieval library needs to be constructed in advance. The key parameters corresponding to different forming features are different. For example, the key parameters corresponding to the forming feature of drawing are the cross-section line parameters and the die-splitting parameters. Another example is that the key parameters corresponding to the forming feature of bending are the outer boundary bending parameters and the inner boundary bending parameters. Specifically, the key parameters can be extracted from the forming features of each household appliance sheet metal. After forming the feature expression of the key parameters, the sheet metal product, its forming features, key parameters, feature expression, and die processing information are stored in the knowledge retrieval library.

[0086] In this embodiment, by pre-constructing a knowledge retrieval library to store the feature expressions of sheet metal products with die structures, it can not only facilitate users to quickly retrieve the target sheet metal product from the knowledge retrieval library according to the feature expression, but also improve the retrieval efficiency of the target sheet metal product.

[0087] Step S20: Determine the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features.

[0088] It should be noted that the key parameters of different target forming features are different. For example, when the target forming feature is drawing, the corresponding key parameters are the section line parameters and the die splitting parameters. Another example is that when the target forming feature is bending, the corresponding key parameters are the outer boundary bending parameters and the inner boundary bending parameters. Still another example is that when the target forming feature is flanging, the corresponding key parameters are the surface flanging parameters and the plane flanging parameters.

[0089] In specific implementation, the overall similarity between the household appliance sheet metal and each sheet metal product can be determined after comparing the target forming feature with the forming features of the sheet metal products.

[0090] Step S30: Retrieve the target sheet metal product from the knowledge retrieval library according to the overall similarity.

[0091] It should be noted that the knowledge retrieval library stores the feature expressions of the key parameters corresponding to the forming features of each sheet metal product (the sheet metal digital model of the sheet metal product can be built according to the key parameters corresponding to the forming features of the sheet metal product), and also stores the die processing information of each sheet metal product (such as die processing feature parameters).

[0092] In specific implementation, a similarity threshold can be set, and then the sheet metal products with an overall similarity greater than the similarity threshold are determined as the initial sheet metal products. Then these initial sheet metal products can be pushed to the user, and the user can determine the target sheet metal product from all the initial sheet metal products, that is, determine the target sheet metal product from the initial sheet metal products according to the user's selection result.

[0093] It can be understood that after determining the overall similarity between the household appliance sheet metal and each sheet metal product, the user can also adjust the feature values and weight values when determining the overall similarity according to the actual situation, so as to find a more suitable target sheet metal product when determining the target sheet metal product of the next household appliance sheet metal.

[0094] In specific implementation, as Figure 3 shown, when retrieving for the household appliance sheet metal, it is necessary to first build a sheet metal digital model for each sheet metal product in the knowledge retrieval library (that is, build it through the key parameters of the forming features of the sheet metal product), then compare the key parameters of the forming features of the household appliance sheet metal with the sheet metal digital models in the knowledge retrieval library to determine the overall similarity, and finally determine the target sheet metal product in the knowledge retrieval library based on the overall similarity.

[0095] Step S40: Design the die structure of the household appliance sheet metal according to the die processing information of the target sheet metal product.

[0096] It can be understood that after obtaining the target sheet metal product, the die processing information of the target sheet metal product can be directly used for the die structure design of the household appliance sheet metal.

[0097] In this embodiment, the target forming features of the household appliance sheet metal are determined; the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library is determined according to the target forming features; the target sheet metal product is retrieved from the knowledge retrieval library according to the overall similarity; and the die structure of the household appliance sheet metal is designed according to the die processing information of the target sheet metal product. In the above manner, the forming features of the household appliance sheet metal are compared with the forming features of the sheet metal products in the knowledge retrieval library to determine the overall similarity between the household appliance sheet metal and each sheet metal product in the knowledge retrieval library, and the sheet metal product corresponding to the household appliance sheet metal is determined according to the overall similarity, so as to call the die processing information of the sheet metal product from the knowledge retrieval library to drive the die design of the household appliance sheet metal, making the die design of the household appliance sheet metal no longer rely on personal experience, thereby improving the efficiency of die design and manufacturing of the household appliance sheet metal.

[0098] Reference Figure 4 , Figure 4 is a schematic flowchart of the second embodiment of a method for designing a die structure of a household appliance sheet metal according to the present invention.

[0099] Based on the above first embodiment, in the method for designing the die structure of the household appliance sheet metal in this embodiment, the step of determining the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features includes:

[0100] Step S301: Determine the target feature expression of the target forming feature.

[0101] It can be understood that for any type of target forming feature, it can be digitized according to its key parameters, so as to obtain the target feature expression of the target forming feature. Specifically, as Figure 5 shown, the key parameters of the forming features of the household appliance sheet metal can be determined through hatching and parting lines, and the target feature expression of the household appliance sheet metal can be determined through the key parameters.

[0102] Step S302: Retrieve the feature expressions of the sheet metal products from the knowledge retrieval library.

[0103] In one embodiment, the target forming features include at least one of drawing, bending, flanging, punching, and local forming; wherein,

[0104] the step of determining the target feature expression of the target forming feature includes:

[0105] When there is drawing in the target forming feature, determine the drawing feature expression according to the section line parameters and parting parameters;

[0106] When there is bending in the target forming feature, determine the bending feature expression according to the bending parameters;

[0107] When there is a flanging in the target forming feature, determine the flanging feature expression according to the flanging parameters;

[0108] When there is a punching in the target forming feature, determine the punching feature expression according to the punching parameters;

[0109] When there is a local forming in the target forming feature, determine the local forming feature expression according to the local forming feature;

[0110] Determine the target feature expression according to the drawing feature expression, the bending feature expression, the flanging feature expression, the punching feature expression, and the local forming feature expression.

[0111] In a specific implementation, the specific determination method of the target feature expression is as follows:

[0112]

[0113] In the formula, Product forming feature represents the target forming feature of the household appliance sheet metal (i.e., the target feature expression), triming feature represents the punching feature of the household appliance sheet metal (i.e., the punching feature expression), drawing feature represents the drawing feature of the household appliance sheet metal (i.e., the drawing feature expression), bending feature represents the bending feature of the household appliance sheet metal (i.e., the bending feature expression), and local feature represents the local feature of the household appliance sheet metal (i.e., the local forming feature expression).

[0114] In an embodiment, the section line parameters include the section line height, the section line draft angle, and the section line width, and the parting parameters include the straight edge fillet radius, the horizontal direction stretching dimension, and the vertical direction stretching dimension; wherein,

[0115] The determining the drawing feature expression according to the section line parameters and the parting parameters includes:

[0116] Construct a section line parameter matrix model according to the section line height, the section line draft angle, and the section line width;

[0117] Construct a parting parameter matrix model according to the straight edge fillet radius, the horizontal direction stretching dimension, and the vertical direction stretching dimension;

[0118] Determine the drawing feature expression according to the section line parameter matrix model and the parting parameter matrix model.

[0119] It should be noted that when the target forming feature is drawing, the key parameters of the forming feature can be determined as the section line parameters and the die splitting parameters; the section line parameters include the section line height (drawing height), the section line draft angle, and the section line width; the die splitting parameters include the straight edge fillet radius, the horizontal direction drawing dimension (i.e., the X-direction drawing dimension), and the vertical direction drawing dimension (i.e., the Y-direction drawing dimension).

[0120] In a specific implementation, as Figure 6 shown, the section line parameter matrix model can be expressed as:

[0121]

[0122] In the formula, H represents the section line height, A represents the section line draft angle, W represents the section line width, h i is the distance from the i-th stepped surface from the edge to the center to the bottom surface, a i is the angle between the i-th straight edge from the edge to the center and the stamping direction, w i is the distance from the i-th stepped surface from the edge to the center to the product edge. Among them, when i = 1, the section line parameter matrix model degenerates into a single drawing type, and when i = 2, the section line parameter matrix model is the double drawing type.

[0123] In a specific implementation, as Figure 7 shown, the die splitting parameter matrix model can be expressed as:

[0124]

[0125] In the formula, R represents the straight edge fillet radius, L represents the X-direction drawing dimension, B represents the Y-direction drawing dimension, r i represents the i-th straight edge fillet radius, l i represents the i-th X-direction drawing dimension, b i represents the i-th Y-direction drawing dimension.

[0126] In a specific implementation, the specific determination method of the drawing feature expression is as follows:

[0127] D_MOD drawing_sym = D_MOD drawing_sec ∪D_MOD drawing_prt

[0128] In one embodiment, the bending parameters include the maximum number of bends, the bending angle, and the bending height, and the flanging parameters include the flanging type, the forming method, the flanging height, the flanging angle, and the section angle; among them,

[0129] determining the bending feature expression according to the bending parameters includes:

[0130] Determine the bending feature expression according to the maximum number of bends, bending angle, and bending height;

[0131] The determination of the flanging feature expression according to the flanging parameters includes:

[0132] Determine the flanging feature expression according to the flanging type, forming method, flanging height, flanging angle, and cross-section angle.

[0133] It should be noted that the bending parameters include outer boundary bending and inner boundary bending. Both the outer boundary bending and the inner boundary bending are represented by the bending parameter matrix model. The bending parameter matrix model can be determined according to the maximum number of bends, bending angle, and bending height. Finally, the bending feature expression is determined according to the bending parameter matrix model.

[0134] In a specific implementation, the bending parameter matrix model can be expressed as:

[0135]

[0136] In the formula, N max represents the maximum number of bends of a single bending feature, A represents the bending angle, V represents the bending height, and i represents the number of bends required (for the conventional sheet metal of household appliances, i ≤ 3).

[0137] It should be noted that for a product, there may be multiple bending surfaces. Therefore, it is necessary to increase the maximum number of bends N max N max The bending parameter matrix can represent the bending features of the product to a certain extent.

[0138] In a specific implementation, the specific determination method of the bending feature expression is as follows:

[0139] B_MOD bending_sym = B_MOD bending_in ∪ D_MOD drawing_out

[0140] In the formula, B_MOD bending_in represents the inner boundary bending, and B_MOD bending_in represents the outer boundary bending.

[0141] It should be noted that the flanging parameters include curved surface flanging and plane flanging. Both the curved surface flanging and the plane flanging are represented by the flanging parameter matrix model. The flanging parameter matrix model can be determined according to the flanging type, forming method, flanging height, flanging angle, and cross-section angle. Finally, the flanging feature expression is determined according to the flanging parameter matrix model.

[0142] In a specific implementation, the flanging parameter matrix model can be expressed as:

[0143]

[0144] In the formula, N represents the flanging type, P represents the forming method, H represents the flanging height, R represents the flanging angle, S represents the cross-sectional angle, i represents the number of flangings (for conventional sheet metal parts of household appliances, i ≤ 5). In particular, when the flanging type n = 1, it represents type I flanging; when the flanging type n = 2, it represents type II flanging. When P = 1, it represents tensile flanging, and when p = 2, it represents compressive flanging.

[0145] In specific implementation, the specific determination method of the flanging feature expression is as follows:

[0146] F_MOD flanging_sym

[0147] = F_MOD flanging_plate ∪F_MOD flanging_curve

[0148] In the formula, F_MOD flanging_plate represents planar flanging, and F_MOD flanging_curve represents curved surface flanging

[0149] Step S303: Based on the target feature expression and the feature expression, determine the similarity of the forming features between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library.

[0150] In specific implementation, assume that a household appliance sheet metal has m features, each feature has n parameters, and a single feature parameter is f mn , define the influence factor i mn , which represents the influence of this feature on the whole. The scaling coefficient K can be flexibly defined according to the actual situation. Then:

[0151]

[0152] In the formula, F is the parameter value of this feature in the sheet metal product, and ∑i mn = 1. In particular, when one of f mn and F does not have this feature, the similarity of this feature is 0. Specifically, the similarity of this feature can be defined as:

[0153]

[0154] In specific implementation, the similarity calculation of the drawing feature:

[0155]

[0156] In the formula, K sec and K prt represent the scaling coefficients. Among them, K sec and K prt are shown as follows:

[0157]

[0158]

[0159] In a specific implementation, the calculation of the similarity of the bending feature:

[0160]

[0161] In a specific implementation, the calculation of the similarity of the flanging feature:

[0162]

[0163] Among them, the scaling coefficient K is shown as follows:

[0164]

[0165] Step S304: Determine the overall similarity according to the similarity of the forming features.

[0166] In a specific implementation, in order to further improve the accuracy of the overall similarity, the overall similarity can be determined after combining the basic similarity, product similarity, and forming feature similarity between the household appliance sheet metal and the sheet metal product. Specifically, weight values can be set for various similarities, and after obtaining the forming feature similarity, basic similarity, and product similarity, the overall similarity can be determined according to the weight values.

[0167] In one embodiment, the determining the overall similarity according to the similarity of the forming features includes:

[0168] Determine the basic similarity according to the comparison results of the part materials and overall features between the household appliance sheet metal and the sheet metal product;

[0169] Determine the product similarity according to the sheet metal processing procedures between the household appliance sheet metal and the sheet metal product;

[0170] Based on the basic similarity, the product similarity, and the forming feature similarity, determine the overall similarity.

[0171] It should be noted that the basic similarity refers to the similarity in sheet metal materials and sheet metal structures; the product similarity refers to the similarity in sheet metal processing procedures, and the sheet metal processing procedures can be the number of molds used in the sheet metal processing process. The comparison result of the part materials can be determined by the material similarity between the household appliance sheet metal and the sheet metal product, and the comparison result of the overall features can be determined by the appearance between the household appliance sheet metal and the sheet metal product; the sheet metal processing procedures can be the number of molds used in the sheet metal processing process.

[0172] In this embodiment, the target feature expression of the target forming feature is determined; the feature expressions of sheet metal products are retrieved from the knowledge retrieval library; based on the target feature expression and the feature expressions, the similarity of the forming features between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library is determined; and the overall similarity is determined according to the similarity of the forming features. In the above manner, the similarity comparison between the household appliance sheet metal and each sheet metal product in the knowledge retrieval library is realized by digitizing the forming features, and the target sheet metal product can be quickly retrieved from the knowledge retrieval library, thereby improving the efficiency of the mold design and manufacturing of the household appliance sheet metal.

[0173] In addition, an embodiment of the present invention further provides a storage medium, on which a mold structure design program for household appliance sheet metal is stored. When the mold structure design program for household appliance sheet metal is executed by a processor, the steps of the mold structure design method for household appliance sheet metal as described above are implemented.

[0174] Refer to Figure 8 , Figure 8 which is a structural block diagram of the first embodiment of the mold structure design device for household appliance sheet metal of the present invention.

[0175] As Figure 8 shown, the mold structure design device for household appliance sheet metal proposed by the embodiment of the present invention includes:

[0176] A determination module 10, configured to determine the target forming feature of the household appliance sheet metal.

[0177] The determination module 10 is further configured to determine the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming feature.

[0178] A retrieval module 20, configured to retrieve a target sheet metal product from the knowledge retrieval library according to the overall similarity.

[0179] A design module 30, configured to design the mold structure of the household appliance sheet metal according to the mold processing information of the target sheet metal product.

[0180] It should be understood that the above is only for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not make any restrictions on this.

[0181] In this embodiment, the target forming features of the household appliance sheet metal are determined; the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library is determined according to the target forming features; the target sheet metal product is retrieved from the knowledge retrieval library according to the overall similarity; and the die structure of the household appliance sheet metal is designed according to the die processing information of the target sheet metal product. In the above manner, the forming features of the household appliance sheet metal are compared with the forming features of the sheet metal products in the knowledge retrieval library to determine the overall similarity between the household appliance sheet metal and each sheet metal product in the knowledge retrieval library, and the sheet metal product corresponding to the household appliance sheet metal is determined according to this overall similarity, so as to call the die processing information of the sheet metal product from the knowledge retrieval library to drive the die design of the household appliance sheet metal, making the die design of the household appliance sheet metal no longer rely on personal experience, thereby improving the efficiency of die design and manufacturing of the household appliance sheet metal.

[0182] In one embodiment, the determining module 10 is further configured to:

[0183] Determine the structural classification of the household appliance sheet metal;

[0184] When the structural classification is non-forming type, determine that the target forming features of the household appliance sheet metal are drawing, bending, flanging, punching, and local forming, where the non-forming type includes symmetric type, rectangular asymmetric type, and circular asymmetric type;

[0185] When the structural classification is forming type, determine that the target forming features of the household appliance sheet metal are bending, flanging, punching, and local forming.

[0186] In one embodiment, the determining module 10 is further configured to:

[0187] Obtain the forming features of multiple sheet metal products;

[0188] Extract the key parameters of the forming features;

[0189] Determine the feature expression of the sheet metal product according to the key parameters;

[0190] Construct a knowledge retrieval library according to the feature expressions of multiple sheet metal products.

[0191] In one embodiment, the determining module 10 is further configured to:

[0192] Determine the target feature expression of the target forming features;

[0193] Retrieve the feature expression of the sheet metal product from the knowledge retrieval library;

[0194] Based on the target feature expression and the feature expression, determine the forming feature similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library;

[0195] Determine the overall similarity based on the similarity of the forming features.

[0196] In one embodiment, the target forming features include at least one of drawing, bending, flanging, punching, and local forming; wherein,

[0197] The determining module 10 is further configured to:

[0198] When there is drawing in the target forming features, determine the drawing feature expression according to the section line parameters and the die splitting parameters;

[0199] When there is bending in the target forming features, determine the bending feature expression according to the bending parameters;

[0200] When there is flanging in the target forming features, determine the flanging feature expression according to the flanging parameters;

[0201] When there is punching in the target forming features, determine the punching feature expression according to the punching parameters;

[0202] When there is local forming in the target forming features, determine the local forming feature expression according to the local forming features;

[0203] Determine the target feature expression according to the drawing feature expression, the bending feature expression, the flanging feature expression, the punching feature expression, and the local forming feature expression.

[0204] In one embodiment, the section line parameters include the section line height, the section line draft angle, and the section line width, and the die splitting parameters include the straight edge fillet radius, the horizontal direction stretching dimension, and the vertical direction stretching dimension; wherein,

[0205] The determining module 10 is further configured to:

[0206] Construct a section line parameter matrix model according to the section line height, the section line draft angle, and the section line width;

[0207] Construct a die splitting parameter matrix model according to the straight edge fillet radius, the horizontal direction stretching dimension, and the vertical direction stretching dimension;

[0208] Determine the drawing feature expression according to the section line parameter matrix model and the die splitting parameter matrix model.

[0209] In one embodiment, the bending parameters include the maximum number of bends, the bending angle, and the bending height, and the flanging parameters include the flanging type, the forming method, the flanging height, the flanging angle, and the section angle; wherein,

[0210] The determining module 10 is further configured to:

[0211] Determine the bending feature expression according to the maximum number of bends, the bending angle, and the bending height;

[0212] The determining the flanging feature expression according to the flanging parameters includes:

[0213] Determine the flanging feature expression according to the flanging type, the forming method, the flanging height, the flanging angle, and the cross-sectional angle.

[0214] In one embodiment, the determining module 10 is further configured to:

[0215] Determine the basic similarity according to the comparison result of the part materials and the overall feature comparison result between the household appliance sheet metal and the sheet metal product;

[0216] Determine the product similarity according to the sheet metal processing procedures between the household appliance sheet metal and the sheet metal product;

[0217] Based on the basic similarity, the product similarity, and the forming feature similarity, determine the overall similarity.

[0218] It should be noted that the above-described work flow is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and no limitation is imposed here.

[0219] In addition, for the technical details not described in detail in this embodiment, reference can be made to the mold structure design method of the household appliance sheet metal provided in any embodiment of the present invention, which will not be elaborated here.

[0220] In addition, it should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or system including that element.

[0221] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0222] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as Read Only Memory (ROM) / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0223] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A method for designing the die structure of household appliance sheet metal, characterized in that The die structure design method for the household appliance sheet metal includes: Determine the target forming features of the household appliance sheet metal; Determine the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features; Retrieve the target sheet metal product from the knowledge retrieval library according to the overall similarity; Design the die structure of the household appliance sheet metal according to the die processing information of the target sheet metal product.

2. The method according to claim 1, characterized in that, The determination of the forming features of the household appliance sheet metal includes: Determine the structural classification of the household appliance sheet metal; When the structural classification is non-forming type, determine the target forming features of the household appliance sheet metal as drawing, bending, flanging, punching and local forming, where the non-forming type includes symmetric type, rectangular asymmetric type and circular asymmetric type; When the structural classification is forming type, determine the target forming features of the household appliance sheet metal as bending, flanging, punching and local forming.

3. The method according to claim 1, characterized in that Before determining the target forming features of the household appliance sheet metal, it includes: Obtain the forming features of multiple sheet metal products; Extract the key parameters of the forming features; Determine the feature expression of the sheet metal product according to the key parameters; Construct a knowledge retrieval library according to the feature expressions of multiple sheet metal products.

4. The method according to claim 3, characterized in that The determination of the overall similarity between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library according to the target forming features includes: Determine the target feature expression of the target forming features; Retrieve the feature expressions of the sheet metal products from the knowledge retrieval library; Based on the target feature expression and the feature expression, determine the similarity of the forming features between the household appliance sheet metal and multiple sheet metal products in the knowledge retrieval library; Determine the overall similarity according to the similarity of the forming features.

5. The method according to claim 4, wherein The target forming features include at least one of drawing, bending, flanging, punching and local forming; among them, The determination of the target feature expression of the target forming features includes: When drawing exists in the target forming features, determine the drawing feature expression according to the section line parameters and the die splitting parameters; When bending exists in the target forming features, determine the bending feature expression according to the bending parameters; When flanging exists in the target forming features, determine the flanging feature expression according to the flanging parameters; When punching exists in the target forming features, determine the punching feature expression according to the punching parameters; When local forming exists in the target forming features, determine the local forming feature expression according to the local forming features; Determine the target feature expression according to the drawing feature expression, the bending feature expression, the flanging feature expression, the punching feature expression and the local forming feature expression.

6. The method according to claim 5, wherein The section line parameters include the section line height, the section line draft angle and the section line width, and the die splitting parameters include the straight edge fillet radius, the horizontal direction stretching dimension and the vertical direction stretching dimension; among them, The determination of the drawing feature expression according to the section line parameters and the die splitting parameters includes: Construct a section line parameter matrix model according to the section line height, the section line draft angle and the section line width; Construct a die splitting parameter matrix model according to the straight edge fillet radius, the horizontal direction stretching dimension and the vertical direction stretching dimension; Determine the drawing feature expression according to the cross-section line parameter matrix model and the die splitting parameter matrix model.

7. The method according to claim 5, wherein The bending parameters include the maximum number of bends, the bending angle, and the bending height, and the flanging parameters include the flanging type, the forming method, the flanging height, the flanging angle, and the cross-section angle; where The determination of the bending feature expression according to the bending parameters includes: Determine the bending feature expression according to the maximum number of bends, the bending angle, and the bending height; The determination of the flanging feature expression according to the flanging parameters includes: Determine the flanging feature expression according to the flanging type, the forming method, the flanging height, the flanging angle, and the cross-section angle.

8. The method according to claim 4, wherein The determination of the overall similarity according to the similarity of the forming features includes: Determine the basic similarity according to the comparison results of the part materials and the overall features between the household appliance sheet metal and the sheet metal product; Determine the product similarity according to the sheet metal processing procedures between the household appliance sheet metal and the sheet metal product; Based on the basic similarity, the product similarity, and the similarity of the forming features, determine the overall similarity.

9. A mold structure design device for home appliance sheet metal, characterized in that, The device includes: a memory, a processor, and a die structure design program for household appliance sheet metal stored on the memory and executable on the processor, and the die structure design program for household appliance sheet metal is configured to implement the steps of the die structure design method for household appliance sheet metal according to any one of claims 1 to 8.

10. A storage medium, characterized in that, A die structure design program for household appliance sheet metal is stored on the storage medium, and when the die structure design program for household appliance sheet metal is executed by a processor, the steps of the die structure design method for household appliance sheet metal according to any one of claims 1 to 8 are implemented.

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