Production design method for workpieces and workpieces

Abstract

The present application relates to product optimization design technical field, especially relate to a kind of production design method of workpiece and workpiece.The production design method provided by the present application comprises: topological optimization analysis is carried out to workpiece;According to the analysis result of topological optimization, chain-shaped reinforcing structure formed by a plurality of filling units in series is filled in the digital model of workpiece, and the reconstruction model of workpiece is obtained.Based on this, it is favorable to obtain workpiece with lighter weight and better performance, and compared with the mode of grid automatic filling, the model obtained is more continuous, uniform and complete, and more convenient for subsequent use.

Description

Technical Field

[0001] This invention relates to the field of product optimization design technology, and in particular to a production design method for a workpiece and the workpiece itself. Background Technology

[0002] When performing workpiece optimization design, filling and enhancing the digital model of the workpiece is beneficial to improving the workpiece's strength and other properties while achieving lightweight design.

[0003] In related technologies, the automatic grid filling method is generally used to fill and enhance digital models. However, the resulting models are prone to defects such as discontinuity, unevenness and incompleteness, which affect subsequent use. Summary of the Invention

[0004] The present invention aims to provide a more efficient method for designing and manufacturing workpieces.

[0005] To achieve the above objectives, the workpiece manufacturing design method provided by the present invention includes:

[0006] Perform topology optimization analysis on the workpiece;

[0007] Based on the analysis results of topology optimization, a chain-like reinforcement structure formed by multiple filling units connected in series is filled into the digital model of the workpiece to obtain the reconstructed model of the workpiece.

[0008] In some embodiments, the filling unit is a block filling unit.

[0009] In some embodiments, the block filling unit includes at least one of the following: T-shaped unit, cross-shaped unit, king-shaped unit, straight unit, scholar-shaped unit, earth-shaped unit, field-shaped unit, F-shaped unit, and E-shaped unit.

[0010] In some embodiments, filling a digital model of a workpiece with a chain-like reinforcement structure formed by multiple infill units connected in series includes:

[0011] Fill the solid geometry model of the workpiece with chain-like reinforcing structures; or,

[0012] Chain-like reinforcement structures are filled into the finite element model of the workpiece after topology optimization analysis.

[0013] In some embodiments, obtaining a reconstructed model of the artifact includes:

[0014] The filled chain-like reinforcement structure is combined with the unfilled parts of the digital model of the workpiece to form the design model of the workpiece.

[0015] Based on the design model of the workpiece, the reconstructed model of the workpiece is obtained.

[0016] In some embodiments, obtaining a reconstructed model of the workpiece based on its design model includes:

[0017] Verify the design model of the workpiece;

[0018] The design model of the workpiece that has passed the verification is determined as the reconstructed model of the workpiece.

[0019] In some embodiments, obtaining a reconstructed model of a workpiece based on its design model further includes:

[0020] If the design model of the workpiece fails to pass verification, the design model of the workpiece is re-filled with the chain-like reinforcement structure and verified again until the design model of the workpiece passes verification.

[0021] In some embodiments, verifying the design model of the workpiece includes:

[0022] The performance of the workpiece design model is verified.

[0023] In some embodiments, performance verification of the workpiece design model includes:

[0024] The performance of the workpiece's design model was verified using the finite element method.

[0025] In some embodiments, verifying the design model of the workpiece further includes:

[0026] The design model of the workpiece that has passed performance verification is used for process verification.

[0027] In some embodiments, the production design method further includes:

[0028] Based on the workpiece reconstruction model, produce workpieces.

[0029] In some embodiments, based on the workpiece reconstruction model, producing the workpiece includes:

[0030] Based on the workpiece reconstruction model, the workpiece is produced using additive manufacturing methods.

[0031] In another aspect, the present invention provides a workpiece obtained based on the production design method of the present invention.

[0032] In some embodiments, the workpiece is a thin-walled workpiece.

[0033] In some embodiments, the workpiece is a pre-swirl nozzle of an aircraft engine.

[0034] By performing topology optimization on the workpiece and then filling it with chain-reinforced structures after the topology optimization analysis, it is beneficial to obtain a lighter workpiece with better performance. Compared with the automatic grid filling method, the resulting model is more continuous, uniform and complete, and more convenient for subsequent use.

[0035] It is evident that the production design method provided by this invention is more effective.

[0036] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart illustrating the production design method in some embodiments of the present invention.

[0039] Figure 2 This is a logic block diagram of the production design method in some embodiments of the present invention.

[0040] Figure 3 This is a cross-sectional view of a pre-swirl nozzle in some embodiments of the present invention.

[0041] Figure 4 for Figure 3 A magnified view of a portion at point A.

[0042] Figure 5 for Figure 3 A magnified view of a portion at point B.

[0043] Figure 6 for Figure 5 A schematic diagram of the medium-chain reinforcement structure.

[0044] Figure 7 for Figure 6 A three-dimensional view of the T-shaped unit.

[0045] Figure 8 This is a diagram illustrating the filling effect of a pre-swirl nozzle in some other embodiments of the present invention.

[0046] Figure 9 for Figure 8 A schematic diagram of the medium-chain reinforcement structure.

[0047] Figure 10 for Figure 9 Stereogram of the middle one - shaped unit.

[0048] Figure 11 Filling effect diagram of the pre - swirl nozzle in some other embodiments of the present invention.

[0049] Figure 12 is Figure 11 Schematic diagram of the chain - like reinforcing structure in [].

[0050] Figure 13 is Figure 12 Stereogram of the middle king - shaped unit.

[0051] Figure 14 Filling effect diagram of the pre - swirl nozzle in some other embodiments of the present invention.

[0052] Figure 15 is Figure 14 Schematic diagram of the chain - like reinforcing structure in [].

[0053] Figure 16 is Figure 15 Stereogram of the middle cross - shaped unit.

[0054] In the figure:

[0055] 1. Pre - swirl nozzle; 2. Chain - like reinforcing structure; 31. T - shaped unit; 32. One - shaped unit; 33. King - shaped unit; 34. Cross - shaped unit. Detailed implementation manners

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0057] For technologies, methods, and devices known to those of ordinary skill in the relevant fields, they may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification.

[0058] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] In related technologies, when designing lightweight workpieces, grid cells are automatically filled into the digital model of the workpiece to enhance the digital model's appearance. However, the inventors discovered in practice that this grid-based automatic filling method for lightweight design has many problems.

[0060] On the one hand, while the grid is a built-in filling unit in the software, and grid filling is done automatically, the related algorithms in the software are still immature. After automatic filling, gaps, depressions, or bulges often appear between grids and at the connections between grids and other parts of the digital model, resulting in defects such as discontinuity, unevenness, and incompleteness in the model. Such defective models are difficult to use for subsequent performance verification or production, easily leading to inaccurate verification results or production failures.

[0061] On the other hand, grid filling is performed on a finite element model (or mesh model), resulting in a large amount of model data, which is especially noticeable when the workpiece is large. Excessive model data can make subsequent finite element simulations difficult, causing simulation programs to crash. Furthermore, it can make it difficult to generate the solid geometry models required for additive manufacturing and other production methods, leading to longer generation times and difficulties in slicing during additive manufacturing, or even system crashes.

[0062] Meanwhile, when converting a grid-filled finite element model into a geometric model required for additive manufacturing and other production methods, software typically needs to extract surface contours from the grid-filled finite element model, generate closed-loop surfaces, and then fill them into solid geometry. If there are multiple closed loops, this needs to be done multiple times. When the finite element model features are complex, the surfaces also need to be constructed manually, making the entire process quite complex. Furthermore, to facilitate finite element analysis, chamfers and small holes are generally removed from the finite element model. This means that even if a solid geometric model can be obtained based on the grid-filled finite element model, the obtained solid geometric model will lack the actual small structural features of the workpiece, such as chamfers and small holes. If additive manufacturing or other production processes are to be carried out subsequently, and if high requirements are placed on the small structural features, the missing small structural features need to be added to the generated geometric model, which further increases the complexity and difficulty of the entire production design process.

[0063] Additive manufacturing, also known as 3D printing, is a manufacturing technology that uses digital model files as a basis and software and numerical control systems to deposit special metal materials, non-metal materials or medical and biological materials layer by layer through methods such as extrusion, sintering, melting, photopolymerization or spraying to create physical objects.

[0064] Unlike the "subtractive manufacturing technology" of traditional manufacturing, additive manufacturing technology follows the principle of addition. It can directly transform virtual digital physical models into products, which not only has a short production cycle, but also facilitates the manufacture of complex-shaped parts.

[0065] In additive manufacturing, a three-dimensional geometric model (such as a CAD model) is discretized into slices. These slices are then converted into the path of a print head, which continuously adds material to the part. This process of adding material layer by layer along the print path forms the final solid printed part. Therefore, the generation of the three-dimensional geometric model and the slicing process are crucial for the successful production of additive manufacturing.

[0066] Furthermore, when additive manufacturing thin-walled workpieces based on models with automatic grid filling, there is a problem of powder removal. In the additive manufacturing process of thin-walled workpieces with internal cavities, the cavities are filled with loose powder. After the 3D printing process is complete, the powder remaining in the cavities needs to be removed. However, when using automatic grid filling, it is difficult to obtain a model with powder removal channels, thus easily causing powder removal difficulties.

[0067] Based on the above findings, the present invention provides a workpiece manufacturing design method to achieve a simpler and more effective lightweight workpiece manufacturing design process.

[0068] Reference Figure 1 The workpiece manufacturing design method provided by the present invention includes:

[0069] Step S101: Perform topology optimization analysis on the workpiece.

[0070] Topology optimization is a structural optimization method that focuses on material distribution. Based on given load conditions, constraints, and performance indicators, it optimizes the material distribution within a given region to find the optimal material distribution or force transmission path, thereby achieving the lightest design while satisfying various performance requirements.

[0071] Topology optimization is based on the finite element model. Therefore, in the process of topology optimization of a workpiece, a solid geometric model of the workpiece can be established first based on the actual structural characteristics of the workpiece, and then the established solid geometric model can be meshed to obtain the finite element model of the workpiece.

[0072] After establishing the finite element model of the workpiece based on its solid geometry, it is also necessary to determine the topology optimization domain. For example, in cases where the workpiece is thin-walled, the middle portion of the workpiece located between its two opposing surfaces can be used as the topology optimization domain to ensure that the aerodynamic shape and functional characteristics of the workpiece remain unchanged during the topology optimization process. The specific thickness of the middle portion serving as the topology optimization domain can be adjusted and does not necessarily have to be the entire structure between the two opposing surfaces of the workpiece.

[0073] After determining the topology optimization domain, constraints, optimization boundaries, and optimization objectives are set, and topology optimization analysis is performed on the domain. Constraints can be set according to actual working conditions, such as weight constraints, stress constraints, and manufacturing constraints. The optimization objective can be set as minimizing flexibility (or maximizing stiffness).

[0074] Topology optimization analysis can be performed based on the variable density method. Its basic principle is to use relative density as the design variable and solve it using mathematical programming or optimization criteria. Based on the set threshold of relative density, the cells below the threshold are directly deleted, so that holes are formed on the model.

[0075] Through topology optimization analysis, the material distribution and force transmission path of the workpiece topology optimization domain that satisfy the constraints and objectives can be obtained. The digital model after topology optimization, compared to the original geometric model, has some additional holes.

[0076] Step S102: Based on the analysis results of topology optimization, fill the digital model of the workpiece with a chain-like reinforcement structure 2 formed by multiple filling units connected in series to obtain the reconstructed model of the workpiece.

[0077] The analysis results of topology optimization can provide directions for filling and reinforcing the workpiece.

[0078] In this context, the parts of the digital model that need to be filled can be called the design domain, while the parts that do not need to be filled can be called the non-design domain.

[0079] When determining the design domain of a workpiece, the material density and force transmission path distribution diagram obtained from topology optimization can be used as a reference.

[0080] In some embodiments, the design domain of the workpiece is the hole region with low strength or high stress obtained by topology optimization.

[0081] By filling the design domain with elements, it is beneficial to reduce weight, improve stress concentration, increase the strength of the workpiece, and achieve further optimization of the workpiece design.

[0082] Furthermore, the filling in this invention is no longer grid cells, but a chain-like reinforcement structure 2. The chain-like reinforcement structure 2 is formed by multiple filling cells connected in series. The connection between filling cells, as well as between filling cells and other parts of the digital model, is more continuous, uniform and complete, which is conducive to obtaining a digital model with fewer defects, so as to facilitate subsequent verification or production use.

[0083] Meanwhile, compared to the polyhedral grid cells, the chain-like reinforcement structure 2 extends roughly linearly, making it more adaptable to thin-walled workpieces and facilitating the acquisition of a more continuous, uniform, and complete digital model after filling.

[0084] Furthermore, referring to Figure 5 , Figure 8 , Figure 11 as well as Figure 14 After filling, there are gaps between adjacent chain-like reinforcing structures 2. These gaps can serve as powder discharge channels after additive manufacturing is completed, thus facilitating the discharge of powder after additive manufacturing.

[0085] In addition, the chain-like reinforcement structure 2 filling can be carried out under human control. Compared with the automatic grid filling method, it no longer relies entirely on the related algorithms that are not yet mature in software. Moreover, the shape and size of the filling unit, as well as the number of filling units, can be selected and controlled as needed. Therefore, the filling effect is better and there are fewer defects.

[0086] Furthermore, the filling object of the chain-like reinforcement structure 2 is no longer limited to the finite element model; it can also be directly completed on the solid geometric model. In other words, the aforementioned design domain to be filled can be located on either the finite element model or the solid geometric model. That is, the chain-like reinforcement structure 2 can be filled either within the design domain of the finite element model after topology optimization analysis or within the design domain of the solid geometric model. Moreover, the solid geometric model can be either the original solid geometric model (i.e., the solid geometric model established before topology optimization analysis) or a solid model transformed from the finite element model after topology optimization analysis. Therefore, using the chain-like reinforcement structure 2 filling method also helps to enrich the types of digital models that can be filled, facilitating the selection of a more suitable digital model for filling based on the actual situation.

[0087] In this process, the solid geometric model is filled in, resulting in a smaller model data size. This allows for direct use in additive manufacturing and other actual production processes without the need for conversion from a finite element model to a solid geometric model. Furthermore, it eliminates the problem of missing fine structural features such as chamfers and small holes. Therefore, the entire production design process is simplified, making it more convenient, reducing design difficulty, and improving efficiency. This effect is particularly pronounced when dealing with large workpieces.

[0088] Reference Figure 5-16 In some embodiments, the filling unit is a block-shaped filling unit. Furthermore, the block-shaped filling unit may include at least one of the following: T-shaped unit 31, cross-shaped unit 34, king-shaped unit 33, straight unit 32, scholar-shaped unit, earth-shaped unit, field-shaped unit, F-shaped unit, and E-shaped unit. These block-shaped filling units can also be called block-shaped building block filling units. Their surfaces have a geometric shape similar to closed or open rectangles, and they can be stacked and connected like building blocks to form a centipede-like or semi-centipede-like chain-like reinforcement structure 2, which can effectively solve problems such as structural defects and unevenness at the automatic grid connection points. Moreover, these block-shaped filling units are self-designed regular filling units, and their thickness, length, width, and other dimensions can be flexibly designed. The number of filling layers and the total number can also be flexibly controlled, making them more convenient to use. For example, when the workpiece is a large workpiece, the size of the block-shaped filling unit can be set larger according to the topology analysis optimization results and the workpiece size to reduce the data volume of the filled model (i.e., the reconstructed model), facilitating subsequent verification or printing slices.

[0089] To obtain a reconstructed model of the workpiece after filling the chain-like reinforcement structure 2, refer to Figure 2 In some embodiments, the filled chain-like reinforcement structure 2 is first subjected to a union-intersection operation with the unfilled part (i.e., non-design domain) of the digital model of the workpiece to form the design model of the workpiece; and then the reconstructed model of the workpiece is obtained based on the design model of the workpiece.

[0090] Reference Figure 2 In some embodiments, when obtaining the reconstructed model of the workpiece based on the workpiece's design model, the workpiece's design model is also verified, and the verified workpiece's design model is used as the workpiece's reconstructed model.

[0091] At this point, the reconstructed model of the workpiece is a verified design model of the workpiece. Verification can include at least one of performance verification or process verification, ensuring that the reconstructed model of the workpiece meets at least one of the performance requirements and processing requirements. For example, performance verification can be performed first, followed by process verification after the performance verification is successful. In this way, the reconstructed model of the workpiece meets both performance and processing requirements, enabling the successful production of a qualified workpiece.

[0092] Specifically, performance verification can include the verification of mechanical properties (e.g., strength) or aerodynamic properties (e.g., flow loss), and can be performed using the finite element method.

[0093] The resulting reconstructed model of the workpiece can be used to produce the workpiece. At this point, refer to... Figure 1 The production design method of the present invention further includes:

[0094] Step S103: Based on the workpiece reconstruction model, produce the workpiece.

[0095] For example, refer to Figure 2 Based on the reconstructed model of the workpiece, additive manufacturing methods can be used to produce the workpiece, combining topology optimization technology with additive manufacturing technology to successfully produce lightweight workpieces that meet the performance requirements.

[0096] The production design method provided by this invention is applicable to various workpieces, especially large thin-walled workpieces such as the pre-swirl nozzle 1 of aero-engines.

[0097] For ease of understanding, the following explanation will take pre-swirl nozzle 1 as an example.

[0098] The pre-swirl nozzle 1 of an aero-engine is a large, thin-walled annular component with an inner and outer thin-walled structure, a large surface area (approximately 400 mm in diameter), and a small thickness (approximately 2 mm). Located between the combustion chamber and the high-pressure turbine, it primarily provides pre-swirled cooling gas to the subsequent turbine rotor. It is a crucial component of the aero-engine's air supply system and one of the most difficult engine parts to manufacture.

[0099] The pre-swirl nozzle 1 is conventionally manufactured using casting technology, but this results in low yield and long production cycle. Therefore, there is an urgent need to provide a new method for producing the pre-swirl nozzle 1.

[0100] Because additive manufacturing technology has outstanding advantages in manufacturing complex structural parts, the inventors attempted to use additive manufacturing technology to produce a pre-rotating nozzle 1.

[0101] However, in practice, it has been found that generating an optimized digital model for additive manufacturing of the pre-swirl nozzle 1 is a challenge. This is because an optimized digital model for additive manufacturing of the pre-swirl nozzle 1 needs to meet requirements not only in terms of aerodynamic performance, strength, and additive manufacturing processes, but also in terms of weight reduction. However, when using the automatic grid filling method based on finite element analysis results for lightweight design of the pre-swirl nozzle 1, the filled finite element model suffers from numerous defects, excessive data volume, and difficulty in generating a solid geometric model. Furthermore, the generated solid geometric model presents challenges in slicing and powder removal during additive manufacturing, making it difficult to successfully achieve additive manufacturing of the pre-swirl nozzle 1.

[0102] In view of the above situation, in some embodiments of the invention, the following manufacturing design method is adopted for the pre-swirl nozzle 1:

[0103] First, establish the solid geometric model of the pre-swirling nozzle 1. Specifically, the solid geometric model of the pre-swirling nozzle 1 can be established in CAD software based on its actual dimensions.

[0104] Then, based on the established solid geometric model, a topology optimization analysis was performed on the pre-swirl nozzle 1.

[0105] Specifically, the established solid geometric model can be meshed first to obtain the finite element model of the pre-swirl nozzle 1. Without changing the aerodynamic shape and functional characteristics of the pre-swirl nozzle 1, the middle layer of the thin-walled inner and outer rings of the pre-swirl nozzle 1 is taken as the topology optimization domain. Then, according to the actual working conditions, the relevant constraints of optimization analysis such as temperature field, cavity pressure, installation boundary displacement, weight constraint, stress constraint and manufacturing constraint are set, and the optimization objective of minimizing compliance is added. The topology optimization of the middle layer of the pre-swirl nozzle 1 is carried out to obtain the material distribution and force transmission path of the middle layer structure of the inner and outer rings of the pre-swirl nozzle 1 that satisfies the constraints and objectives.

[0106] Subsequently, based on the topology optimization analysis results, the design domain of the pre-swirl nozzle 1 was determined, and the chain-like reinforcement structure 2 was filled in the design domain to obtain the design model of the pre-swirl nozzle 1.

[0107] Specifically, on the original solid geometric model of the pre-swirl nozzle 1, material can be artificially removed to construct holes obtained from topology optimization analysis. Holes showing higher stress concentration as indicated by the topology optimization analysis are then used as design domains. T-shaped elements 31 are then introduced into these holes for filling. During this process, multiple T-shaped elements are introduced and connected in series to form chain-like reinforcement structures 2. The multiple chain-like reinforcement structures 2 are then subjected to union and intersection operations with the structures outside the design domain of the solid geometric model to form a complete, integrated filled digital model of the pre-swirl nozzle 1, i.e., the design model of the pre-swirl nozzle 1. In this process, the introduced filling elements are not limited to T-shaped elements 31; for example, referring to… Figure 9-16 It can also be filled with other block-shaped elements such as the straight element 32, the king-shaped element 33, and the cross-shaped element 34. The size, layout, and number of filling elements can be adjusted in combination with the size of the pre-rotating nozzle 1 and the topology optimization analysis results, so as to more effectively reduce weight and improve stress concentration, and more effectively solve the problems of more model defects, large model data volume, and difficulty in slicing during additive manufacturing when the pre-rotating nozzle 1 adopts the grid automatic filling method.

[0108] Then, the obtained design model is exported for performance and process verification.

[0109] When verifying the performance of the pre-swirling nozzle 1, finite element analysis tools can be used to check its aerodynamic performance (such as rotation ratio and flow loss) and strength. If the requirements are not met, the aforementioned chain-reinforcement structure 2 filling steps are repeated. Based on the analysis results, the design weaknesses are identified, the structure is improved, and the design model is improved until it passes performance verification.

[0110] After the design model passes performance verification, a design model that meets the format requirements of additive manufacturing equipment is exported and handed over to the manufacturer for process verification to ensure that the redesigned structure can be sliced ​​and manufactured through additive manufacturing processes.

[0111] The design model that passed process verification was ultimately identified as the reconfigurable model and used for additive manufacturing of the pre-swirl nozzle 1. After additive manufacturing, the powder can be discharged through the channels between the chain-like reinforcing structures 2.

[0112] It is evident that the production design of the pre-swirl nozzle 1 using the method of the present invention is simple and convenient, with a high success rate. It can effectively reduce the weight of the pre-swirl nozzle 1, improve the mechanical properties of the pre-swirl nozzle 1, effectively increase the yield of the pre-swirl nozzle 1, and shorten the production design cycle of the pre-swirl nozzle 1.

[0113] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for designing the production of a workpiece, characterized in that, include: Perform topology optimization analysis on the workpiece; Based on the analysis results of topology optimization, a chain-like reinforcement structure (2) formed by multiple filling units connected in series is filled into the digital model of the workpiece to perform filling reinforcement, thereby obtaining the reconstructed model of the workpiece; The filling unit is a block filling unit, which includes at least one of the following: T-shaped unit (31), cross-shaped unit (34), king-shaped unit (33), straight unit (32), scholar-shaped unit, earth-shaped unit, field-shaped unit, F-shaped unit, and E-shaped unit; Furthermore, the obtained reconstructed model of the workpiece includes: The filled chain-like reinforcement structure (2) is subjected to a union-intersection operation with the unfilled part of the digital model of the workpiece to form the design model of the workpiece; Based on the design model of the workpiece, the reconstructed model of the workpiece is obtained.

2. The workpiece production design method according to claim 1, characterized in that, The process of filling the digital model of the workpiece with a chain-like reinforcement structure (2) formed by multiple filling units connected in series includes: The chain-like reinforcing structure (2) is filled into the solid geometry model of the workpiece; or, The chain-like reinforcement structure (2) is filled into the finite element model of the workpiece after topology optimization analysis.

3. The workpiece production design method according to claim 1, characterized in that, The process of obtaining a reconstructed model of the workpiece based on its design model includes: The design model of the workpiece is verified; The design model of the workpiece that has passed verification is determined as the reconstructed model of the workpiece.

4. The workpiece production design method according to claim 3, characterized in that, The process of obtaining the reconstructed model of the workpiece based on its design model further includes: If the design model of the workpiece fails to pass verification, the design model of the workpiece is refilled with the chain-like reinforcement structure (2) and verified again until the design model of the workpiece passes verification.

5. The workpiece production design method according to claim 3, characterized in that, The verification of the design model of the workpiece includes: The performance of the design model of the workpiece is verified.

6. The workpiece production design method according to claim 5, characterized in that, The performance verification of the design model of the workpiece includes: The performance of the design model of the workpiece was verified using the finite element method.

7. The workpiece production design method according to claim 5, characterized in that, The verification of the design model of the workpiece also includes: The design model of the workpiece that has passed performance verification is then subjected to process verification.

8. The workpiece production design method according to claim 1, characterized in that, The production design method for the workpiece also includes: The workpiece is produced based on its reconstruction model.

9. The workpiece production design method according to claim 8, characterized in that, The production of the workpiece based on the reconstruction model of the workpiece includes: Based on the reconstructed model of the workpiece, the workpiece is produced using additive manufacturing.

10. A workpiece, characterized in that, It is obtained based on the production design method of the workpiece as described in any one of claims 1-9.

11. The workpiece according to claim 10, characterized in that, The workpiece is a thin-walled workpiece.

12. The workpiece according to claim 10 or 11, characterized in that, The workpiece is a pre-rotating nozzle (1) for an aero-engine.

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