Forming method of grid rudder

Abstract

The invention discloses a forming method of a grid rudder, which comprises the following steps of: stacking and arranging a target number of forming part models in design software to form a stacked main body model, forming and processing by adopting metal additive manufacturing equipment to obtain a stacked main body part, carrying out heat treatment on the stacked main body part, separating the stacked main body part from a substrate, and forming the stacked main body part on the substrate. And cutting the stacked main body piece until a target number of grid rudder primary products are obtained, then carrying out finish machining on the windward sides and the assembly surfaces of the grid rudder primary products, and obtaining a grid rudder finished product until the forming requirements are met. The defects that the process material preparation period is long, the manufacturing process is long and the material utilization rate is low are effectively overcome, the process steps are reduced, the operation problems of welding deformation and tool complexity are eliminated, the consistency of finished products is improved, the stability of the products can be kept, the production operation efficiency can be improved under the requirement of batch production operation, and the production cost is reduced. And the operation difficulty and the operation intensity of operators are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aviation rudder wing parts manufacturing, and in particular to a forming method of a grid rudder. Background Art

[0002] Aviation rudders are important parts of aviation equipment used to control flight direction and attitude. They are located in the tail of the aircraft and include rudders and elevators. Aviation rudders play an important role in various stages of spacecraft takeoff, cruising, and landing, helping pilots control the attitude and direction of the aircraft to adapt to different flight conditions.

[0003] The grid rudder can use airflow to control the attitude through deflection, while the grid wing mainly plays the role of stabilizing the attitude, which is of great significance to personnel safety and rocket body recycling.

[0004] Grid rudders are important components for adjusting and controlling the flight attitude of rockets. They are often made of forged and precision-machined frames, welded frames, and formed spacers, and finally welded to form grid rudder parts. This method has a long preparation cycle, a lengthy manufacturing process, low material utilization, and involves many process methods. Welding deformation and tooling preparation are complex and expensive, which seriously restricts the rapid and low-cost mass production of grid rudders. Summary of the invention

[0005] In view of the defects existing in the prior art, the present application provides a forming method of a grid rudder to solve the problems of low efficiency and low consistency of various grid rudder forming methods in the prior art.

[0006] The above-mentioned purpose of the present application is mainly achieved through the following technical solutions:

[0007] A method for forming a grid rudder, the method comprising:

[0008] In the design software, the target number of molded part models are stacked and arranged to form a stacked main body model;

[0009] The stacked main body is obtained by forming and processing using metal additive manufacturing equipment;

[0010] performing heat treatment on the stacked main body;

[0011] Separating the stacked main body from the substrate, and cutting the stacked main body until a target number of grid rudder primary products are obtained;

[0012] The windward surface and the assembly surface of the initial grid rudder product are finely processed until the molding requirements are met to obtain a finished grid rudder product.

[0013] In an optional embodiment, before stacking and arranging the molded part models, the stacking direction of the molded part models is determined according to the processing direction of the metal additive manufacturing equipment.

[0014] In an optional embodiment, before the metal additive manufacturing equipment performs the forming process, the stacked main body model is introduced into the metal additive manufacturing equipment, and the position and direction of the stacked main body model are confirmed and adjusted.

[0015] In an optional embodiment, before the metal additive manufacturing device performs a forming process, parameters of laser power, scanning speed, and printing layer thickness are set and confirmed in the metal additive manufacturing device.

[0016] In an optional embodiment, the metal additive manufacturing equipment operates by laser selective melting.

[0017] In an optional embodiment, before the metal additive manufacturing equipment performs a forming operation, alloy powder with a material grade of GH4169 is loaded into the metal additive manufacturing equipment.

[0018] In an optional embodiment, when the stacked main body is heat treated, a solid solution aging method is adopted.

[0019] In an optional embodiment, when cutting the stacked main body members, wire cutting is adopted, and each cutting surface is maintained with a processing allowance of 2 mm to 3 mm.

[0020] In an optional embodiment, when finishing the initial grid rudder product, a five-axis machine tool is used for milling.

[0021] In an optional embodiment, after the initial fine processing of the grid rudder is completed, fluorescence detection and size detection are respectively performed until the fine processing requirements are met.

[0022] Compared with the prior art, the advantages of this application are:

[0023] The forming method of the grid rudder in the present application is to first stack and arrange the target number of forming part models in the design software to form a stacked main body model, then use metal additive manufacturing equipment to perform forming processing to obtain the stacked main body parts, then heat treat the stacked main body parts, and then separate the stacked main body parts from the substrate and cut the stacked main body parts until the target number of grid rudder preliminary products are obtained, and then fine-process the windward surface and assembly surface of the grid rudder preliminary products until the forming requirements are met to obtain the grid rudder finished product. Compared with the traditional forming method, it effectively avoids the defects of long process preparation cycle, lengthy manufacturing process and low material utilization rate, reduces the process steps, eliminates welding deformation and complex tooling operation problems, improves the consistency of the finished product, and can maintain product stability under the needs of mass production operations, improve production operation efficiency, and reduce the operating difficulty and work intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of a process for forming a grid rudder provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the structure of a molded part model provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of stacking molded part models provided in an embodiment of the present application;

[0028] In the figure: 100, molded part model. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0030] like Figure 1 As shown, Figure 1 A schematic flow chart of a method for forming a grid rudder provided in an embodiment of the present application, a method for forming a grid rudder, the forming method comprising:

[0031] like Figure 2 , Figure 3 As shown, Figure 2 This is a schematic diagram of the structure of the molded part model 100 provided in an embodiment of the present application. Figure 3 The schematic diagram of stacking the molded part models 100 provided in the embodiment of the present application is that the target number of molded part models 100 are stacked and arranged in the design software to form a stacked main body model; in the design software, a three-dimensional model of a single grid rudder is created according to the design requirements and specifications of the grid rudder. Then, the target number of grid rudder models are stacked in a certain arrangement order to form an overall stacked main body model. This step ensures the consistency and accuracy of the grid rudder during the manufacturing process, and also improves the efficiency of subsequent continuous and large-scale production operations.

[0032] Metal additive manufacturing equipment is used to control the energy, scanning speed and path of the laser or electron beam according to the data of the stacking body model to ensure the strength and precision of the stacking body parts, and the stacking body parts are obtained by molding.

[0033] The stacked main body is heat treated. The stacked main body after forming needs to be heat treated to eliminate the internal stress generated during the forming process, improve the microstructure of the material, and improve the mechanical properties and corrosion resistance of the grid rudder. The process parameters of the heat treatment, such as temperature, time and cooling rate, need to be precisely controlled according to the material characteristics and performance requirements.

[0034] Separating the stacked main body from the substrate, and cutting the stacked main body until a target number of grid rudder primary products are obtained;

[0035] The windward surface and assembly surface of the grid rudder preliminary product are finely processed to ensure that the surface is smooth and defect-free, meets the requirements of aerodynamics and assembly, and obtains a finished grid rudder.

[0036] The resulting grid rudder product has excellent strength, rigidity and corrosion resistance, and can meet the requirements of use in various harsh environments. Through this molding method, a large number of high-quality grid rudder products can be manufactured efficiently and accurately to meet the structural operation requirements of the target field.

[0037] In an optional embodiment, the principle of the forming method of the grid rudder in the present application is: the forming method first stacks and arranges a target number of forming part models 100 in the design software to form a stacked main body model, then uses metal additive manufacturing equipment to form and process the stacked main body parts, and then heat treats the stacked main body parts, and then separates the stacked main body parts from the substrate, cuts the stacked main body parts, until the target number of grid rudder preliminary products are obtained, and then fine-processes the windward surface and assembly surface of the grid rudder preliminary products until the forming requirements are met to obtain a finished grid rudder. Compared with traditional forming methods, the method effectively avoids the defects of long process preparation cycle, lengthy manufacturing process and low material utilization rate, reduces process steps, eliminates welding deformation and complex tooling operation problems, improves the consistency of finished products, and can maintain product stability, improve production operation efficiency, and reduce the operating difficulty and intensity of operators under the needs of mass production operations.

[0038] In an optional embodiment, before stacking and arranging the molded part models 100 , the stacking direction of the molded part models 100 is determined according to the processing direction of the metal additive manufacturing equipment.

[0039] In order to improve the production efficiency and quality of the grid rudder molded parts, it is necessary to determine the stacking direction of the molded part models 100 according to the processing direction of the metal additive manufacturing equipment before stacking and arranging the molded part models 100.

[0040] First, the processing direction of the metal additive manufacturing equipment needs to be analyzed in detail. According to the processing direction of the equipment, the optimal stacking direction of the molded part model 100 is determined. This usually involves considering factors such as the support requirements, thermal expansion, and contraction of the molded part during the manufacturing process to ensure the stability of the molded part during the manufacturing process and the accuracy of the final product.

[0041] Before the actual stacking arrangement, computer simulation software can be used to simulate and analyze the stacking direction and layout of the molded parts, which helps to predict possible problems that may occur during the molding process, such as stress concentration, deformation, etc., and adjust the stacking direction and layout accordingly.

[0042] After the stacking direction and strategy are determined, the molded part models 100 are stacked and arranged in a predetermined direction and layout to ensure the accuracy and consistency of the stacked main body model. By determining the stacking direction before stacking the molded part models 100, the efficiency and quality of the metal additive manufacturing process can be significantly improved, and the post-processing workload can be reduced.

[0043] In an optional embodiment, before the metal additive manufacturing equipment performs the forming process, the stacked main body model is introduced into the metal additive manufacturing equipment, and the position and direction of the stacked main body model are confirmed and adjusted.

[0044] In order to ensure the smooth forming process of the grid rudder, it is necessary to import the stacked main body model into the equipment before the metal additive manufacturing equipment performs the forming process, and confirm and adjust the position and direction.

[0045] Convert the stacked body model completed in the design software into a file format that can be recognized by the metal additive manufacturing equipment, such as STL, OBJ or AMF, and then import the stacked body model file into the control system of the metal additive manufacturing equipment. In the control software of the metal additive manufacturing equipment, preview the imported stacked body model, check the integrity and accuracy of the model, and then confirm whether the size of the model meets the design requirements and the working range of the equipment.

[0046] Adjust the position of the model on the forming platform and ensure that the reference point of the model is aligned with the origin of the equipment to improve the forming accuracy. According to the geometric features of the model and the processing direction of the forming equipment, adjust the orientation of the model to reduce the forming time, material consumption and post-processing workload, and ensure that certain features of the model will not cause forming defects due to improper direction, such as overhanging parts, thin-walled structures, etc.

[0047] In an optional embodiment, before the metal additive manufacturing device performs a forming process, parameters of laser power, scanning speed, and printing layer thickness are set and confirmed in the metal additive manufacturing device.

[0048] In order to ensure that the metal additive manufacturing equipment can accurately perform the forming process of the grid rudder, the operator needs to carefully set and confirm the key laser processing parameters before starting the equipment.

[0049] Laser power, scanning speed and printing layer thickness are key parameters affecting the quality of metal additive manufacturing, and together determine the molding quality, surface roughness, internal structure and mechanical properties of the parts.

[0050] The operator needs to adjust the power of the laser according to the characteristics of the processed material (such as melting point, absorption rate) and the required melting effect. Too high power may cause excessive melting of the material, forming spheroidization or oxidation; too low power may cause insufficient melting and form pores.

[0051] The scanning speed determines the speed at which the laser moves on the powder bed, affecting the stability of the molten pool and the molding accuracy of the part. Too fast a scanning speed may result in insufficient melting, while too slow a scanning speed may cause excessive melting.

[0052] The printing layer thickness determines the thickness of each layer of powder, affecting the surface quality and molding time of the part. Increasing the layer thickness can improve processing efficiency, but it may also require higher laser energy input to ensure complete melting.

[0053] In an optional embodiment, the metal additive manufacturing equipment operates by laser selective melting.

[0054] The metal additive manufacturing equipment adopts the selective laser melting (SLM) molding method. Selective laser melting uses a high-energy density laser beam to melt metal powder layer by layer according to the slicing data of the three-dimensional model, and constructs a three-dimensional solid part by stacking layers.

[0055] Before the SLM process begins, a layer of metal powder is evenly laid on the build platform to form a powder bed. Under computer control, a high-power laser beam selectively melts the metal powder along the path of the sliced ​​model to form a layer of the part. The melted metal powder quickly solidifies to form a solid layer of the part, which is bonded to the next layer of powder bed. The build platform is lowered a certain distance, and a new layer of metal powder is laid again, repeating the laser scanning and melting process until the entire part is built.

[0056] In an optional embodiment, before the metal additive manufacturing equipment performs a forming operation, alloy powder with a material grade of GH4169 is loaded into the metal additive manufacturing equipment.

[0057] Alloy powder with material grade GH4169 is a nickel-based precipitation hardening high-temperature alloy with excellent high-temperature strength, corrosion resistance and good processability. This alloy exhibits extremely high tensile strength and yield strength below 650°C, and its strength decreases slowly with increasing temperature, making it an ideal choice for high-temperature components.

[0058] GH4169 alloy powder has good fluidity and high tap density. Before loading GH4169 alloy powder into metal additive manufacturing equipment, the equipment needs to be fully inspected and cleaned to ensure that there are no impurities and residual powder inside the equipment, and to avoid mixing powders of different material grades to maintain the consistency of the printing material.

[0059] According to the characteristics of GH4169 alloy powder, the relevant parameters of the metal additive manufacturing equipment are set, including laser power, scanning speed and printing layer thickness, to ensure that the powder can be accurately melted and form dense parts.

[0060] In an optional embodiment, when the stacked main body is heat treated, a solid solution aging method is adopted.

[0061] Solution aging is a heat treatment process for metal materials. Through solution treatment and aging treatment, the performance of the material is improved, making it have better mechanical properties and corrosion resistance.

[0062] Solution aging treatment includes two main steps: solution treatment and aging treatment. Solution treatment is to heat the alloy to an appropriate temperature and maintain it for a period of time to allow one or more components to enter the solid solution, and then quickly cool it to keep these components in the solid solution. Aging treatment is carried out after solution treatment, and the purpose is to precipitate alloy materials in the metal structure to improve the strength of the process.

[0063] EffectSolution aging treatment can effectively improve the mechanical properties of materials, such as improving strength, hardness and corrosion resistance. For example, in nickel-based alloys, solution aging treatment can change the matrix grain size and the degree of dissolution of the precipitated phase, and regulate the size and volume fraction of the γ phase uniformly dispersed in the matrix, thereby significantly improving the strength of the alloy. Through solution aging treatment, the performance of the material is significantly improved.

[0064] In an optional embodiment, when cutting the stacked main body, wire cutting is used, and each cutting surface is kept with a machining allowance of 2mm-3mm. To ensure the machining quality, each cutting surface is kept with a machining allowance of 2mm-3mm to allow sufficient material removal in the subsequent finishing step to ensure the dimensional accuracy and surface quality of the final product.

[0065] In an optional embodiment, when finishing the initial grid rudder product, a five-axis machine tool is used for milling, which can realize complex spatial surface processing, reduce the number of clamping times during the processing, and improve processing efficiency and finished product quality.

[0066] In an optional embodiment, after the initial fine processing of the grid rudder is completed, fluorescence detection and size detection are respectively performed until the fine processing requirements are met.

[0067] After finishing, the grid rudder products are subjected to fluorescence testing, which is a non-destructive testing method used to detect tiny cracks, defects or discontinuities on the surface of the material. The fluorescent liquid penetrates into the surface defects and shows fluorescence under ultraviolet light, which facilitates detection and evaluation. At the same time, dimensional inspection is carried out to ensure that the dimensional accuracy of the grid rudder products meets the design requirements.

[0068] Through fluorescence detection and dimension detection, the processing quality of the grid rudder initial product can be ensured, and deviations or errors in the processing process can be discovered and corrected in time, so as to ensure the processing quality and accuracy of the grid rudder initial product and meet the requirements of high-performance applications.

[0069] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0070] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0071] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0074] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0075] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

[0076] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field.

Claims

1. A method for forming a grid rudder, characterized in that: The molding method comprises: In the design software, the target number of molded part models are stacked and arranged to form a stacked main body model; The stacked main body is obtained by forming and processing using metal additive manufacturing equipment; performing heat treatment on the stacked main body; Separating the stacked main body from the substrate, and cutting the stacked main body until a target number of grid rudder primary products are obtained; The windward surface and the assembly surface of the initial grid rudder product are finely processed until the molding requirements are met to obtain a finished grid rudder product.

2. The method for forming a grid rudder according to claim 1, characterized in that: Before stacking and arranging the molded part models, the stacking direction of the molded part models is determined according to the processing direction of the metal additive manufacturing equipment.

3. The method for forming a grid rudder as claimed in claim 2, characterized in that: Before the metal additive manufacturing equipment performs the forming process, the stacked main body model is introduced into the metal additive manufacturing equipment, and the position and direction of the stacked main body model are confirmed and adjusted.

4. The method for forming a grid rudder as claimed in claim 2, characterized in that: Before the metal additive manufacturing device performs a forming process, parameters of laser power, scanning speed and printing layer thickness are set and confirmed in the metal additive manufacturing device.

5. The method for forming a grid rudder according to claim 1, characterized in that: The metal additive manufacturing equipment operates by laser selective melting forming.

6. The method for forming a grid rudder according to claim 1, characterized in that: Before the metal additive manufacturing equipment performs a molding operation, alloy powder with a material grade of GH4169 is loaded into the metal additive manufacturing equipment.

7. The method for forming a grid rudder as claimed in claim 1, characterized in that: When the stacked main body is heat treated, a solution aging method is adopted.

8. The method for forming a grid rudder as claimed in claim 1, characterized in that: When cutting the stacked main body, wire cutting is used, and each cutting surface is kept with a processing allowance of 2mm-3mm.

9. The method for forming a grid rudder as claimed in claim 1, characterized in that: When finishing the initial grid rudder product, a five-axis machine tool is used for milling.

10. The method for forming a grid rudder according to claim 1, characterized in that: After the initial fine processing of the grid rudder is completed, fluorescence detection and size detection are respectively performed until the fine processing requirements are met.

Images