Method of casting low-swirl work vanes

Abstract

The application provides a casting method of low-vortex working blade, comprising the following steps: S101, testing wax mold design, and milling and processing a testing wax mold consistent with a required blade; S102, testing mold group design, combining a single formal wax mold and a pouring mechanism, and simulating and optimizing on software; S103, testing wax mold shell, testing casting with the testing mold group, and data analysis on typical structures of the testing casting; S104, correcting and anti-deformation testing on the result of S103, and completing formal wax mold design; S105, formal mold group design, combining multiple formal wax molds and a pouring mechanism, and the pouring mechanism comprising a T-shaped blind riser to improve blade rigidity; S106, formal wax mold shell, formal casting and iterative optimization with the formal mold group, and continuously adjusting casting parameters until a low-vortex working blade casting meeting size and material standards is obtained, so as to solve the problems of blade breakage and shrinkage, and improve the consistency of the casting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blade casting, more particularly to a casting method of low-vortex working blade. BACKGROUND

[0002] In an aero-engine, the low-pressure turbine plays a key role by extracting energy from the gas to push the fan, thereby providing propulsion. In particular, in modern high-efficiency engines, such as the advanced Leap aero-engine (Intercontinental Engine), the design and manufacture of the low-pressure turbine become particularly critical. The low-pressure turbine of these advanced engines usually has a complex structure, including multiple stages of working blades and guide vanes. The number and shape of these blades have a significant impact on the performance of the engine. In order to improve aerodynamic efficiency, the low-pressure turbine blades adopt a "wide chord and narrow length" design, with a long and thin blade body, which not only reduces the weight of the entire low-pressure turbine unit, but also improves the efficiency of the low-pressure turbine. However, this complex blade structure and special geometry pose some challenges to traditional casting methods. The size and shrinkage of the blade need to be very precisely controlled to ensure the quality and performance of the blade.

[0003] Chinese patent CN 113466426 A discloses a method for obtaining the shrinkage of a test casting, which can quickly and accurately obtain the shrinkage of different castings. However, this method fails to precisely control the shrinkage and size of the blade, and does not precisely control the shrinkage of the blade. Moreover, it cannot solve the problem of blade and blade body fracture or recrystallization caused by casting stress during the manufacturing process.

[0004] Therefore, it is necessary to develop a new method or technology to solve the deficiencies of the method for obtaining the shrinkage of a test casting. The new method should be able to quickly and accurately obtain the shrinkage and size of the blade, and most importantly, be able to precisely control the shrinkage of the blade. SUMMARY

[0005] The present application provides a casting method of low-vortex working blade, which aims to solve the problems of blade fracture and shrinkage, improve the rigidity of the blade body near the crown region, reduce stress concentration in specific areas of the blade, and improve the consistency of the casting.

[0006] To achieve the above-mentioned purpose, the present application provides a casting method of low-vortex working blade, comprising:

[0007] Step S101, test wax mold design, the shape, size and contour of the test wax mold are designed according to the shape, size and contour of the required blade, and the test wax mold consistent with the required blade is made by milling processing;

[0008] Step S102, test module design, assemble the single test wax mold designed in step S101 with the pouring mechanism to form a test module, design the size of the pouring mechanism, and simulate and optimize on the software;

[0009] Step S103, test wax mold shell, test casting is performed with the test module, after the casting is completed, the test casting is obtained, three-dimensional size and relative position degree test is performed on the typical structure of the test casting, spatial size and position degree data are obtained, structure feature shrinkage and relative position torsion offset are calculated;

[0010] Step S104, formal wax mold design, according to the results of step S103, correction and reverse deformation test is performed, shape, size and contour design of the formal wax mold is completed;

[0011] Step S105, formal module design, combine multiple formal wax molds and pouring mechanisms, design the size, cotton wrapping and mold shell of the pouring mechanism, the pouring mechanism includes a T-shaped blind riser to improve the rigidity of the blade;

[0012] Step S106, formal wax mold shell, formal casting and iterative optimization are performed with the formal module, casting parameters are constantly adjusted until the low vortex working blade casting that meets the size and material standards is obtained.

[0013] In one embodiment, in step S101, the wax mold includes a tenon, a root, a rim, a blade body, a blade crown and a blade sealing tooth, and the size of the tenon, the root, the rim, the blade body, the blade crown and the blade sealing tooth at zero shrinkage is extracted.

[0014] In one embodiment, in step S101, the test wax mold and the formal wax mold are made of the same material, and the size of the tenon, the root, the rim, the blade body, the blade crown and the blade sealing tooth under blue light or three coordinates is recorded.

[0015] In one embodiment, in step S102, the test module design includes size design of the single test wax mold and the pouring mechanism, and the pouring mechanism includes a sprue cup, a middle injection pipe, a base, a runner disc and a runner combination.

[0016] In one embodiment, in step S102, Procast casting software is used to simulate the size parameters of the middle injection pipe, the base, the runner disc and the runner combination, ensure that the pouring is sufficient, record the position where the porosity is generated and optimize, and defects are not concerned during software simulation.

[0017] In one embodiment, in step S103, three-dimensional size and relative position degree test is performed on the typical structure of the test casting, including the tenon, the root, the rim, the blade body, the blade crown and the blade sealing tooth, corresponding spatial size and position degree are obtained, and then structure feature shrinkage and relative position torsion offset of the tenon, the root, the rim, the blade body, the blade crown and the blade sealing tooth are calculated.

[0018] In one embodiment, in step S104, the feature structure is corrected and deformed according to the shrinkage and relative position twist offset calculated in step S103, and the final wax mold size is designed.

[0019] In one embodiment, in step S105, the formal mold group design includes the size design of the formal wax mold, the middle injection pipe, the base, the runner disc, the runner group, and the T-shaped blind riser, the cotton design, and the mold shell design.

[0020] In one embodiment, in step S105, the size of the middle injection pipe, the base, the runner disc, and the runner group is determined according to experience and simulation software, and the elongation of the T-shaped area of the T-shaped blind riser relative to the blade crown is designed to be 2 times the recrystallization or fracture position of the blade body in step S103.

[0021] In one embodiment, in step S106, the iterative optimization includes iterative optimization of the wax mold shell and cotton design, and continuous adjustment of the casting parameters and mold shell preheating parameters to finally obtain a low vortex working blade casting with metallurgical size meeting the drawing and material standards.

[0022] The present application has the following beneficial effects:

[0023] 1. Wax block machining blade structure optimization method: The present application proposes a wax block structure optimization method for machining blades. This method aims to quickly obtain the three-dimensional structure and features of the blade, while considering the shrinkage problem. By placing the shrinkage according to different structural features, the size and shape of the casting can be better controlled, which helps to improve mold preparation and casting size control.

[0024] 2. T-shaped blind riser design innovation: The present application proposes an innovative blind riser design method to solve the problem of blade crown porosity. This method not only helps to reduce the porosity of the blade crown, but also improves the rigidity of the blade body near the blade crown by designing a T-shaped blind riser. This helps to improve the deformation coordination between the blade crown and the blade body, reduce the stress concentration in the specific area of the blade, and thus reduce the stress of the blade body.

[0025] 3. Suitable for low vortex blade casting of aero-engine: The low vortex blade casting scheme proposed by the present application is suitable for aero-engine low vortex working blade casting. This scheme has high consistency and is expected to have wide application prospects in the aviation field, as it can improve the quality, performance, and production efficiency of the casting. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Flowchart of the casting method of the low vortex working blade of one embodiment of the present application;

[0027] Figure 2 Structure diagram of a test wax mold of a casting method of a low-vortex working blade according to an embodiment of the present application;

[0028] Figure 3 Structure diagram of a test mold group of a casting method of a low-vortex working blade according to an embodiment of the present application;

[0029] Figure 4 Structure diagram of a formal mold group of a casting method of a low-vortex working blade according to an embodiment of the present application.

[0030] In the drawings, 10 is a test wax mold; 11 is a formal wax mold; 21 is a sprue cup; 22 is a center tube; 23 is a base; 24 is a runner plate; 25 is a runner assembly; 26 is a T-shaped blind riser; 101 is a tenon; 102 is a root extension; 103 is a rim plate; 104 is a blade body; 105 is a blade crown; and 106 is a blade sealing tooth. DETAILED DESCRIPTION

[0031] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, identical or similar reference numerals represent identical or similar elements or elements having identical or similar functions. The described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0032] Figure 1 Structure diagram of a casting method of a low-vortex working blade according to an embodiment of the present application, the casting method of the low-vortex working blade comprising:

[0033] In step S101, a test wax mold 10 is designed. The shape, size and profile of the test wax mold 10 are designed according to the shape, size and profile of a required blade, and a test wax mold 10 conforming to the required blade is manufactured by milling processing;

[0034] In step S102, a test mold group is designed. The single test wax mold 10 designed in step S101 is assembled with a gating mechanism to form a test mold group, the gating mechanism is designed in size, and simulation and optimization are performed on software;

[0035] Step S103, test wax mold 10 shell, test casting with test mold group, make test mold group designed in step S102, use shell material to wrap test wax mold 10 to form a mold shell, after removing test wax mold 10, assemble mold shell with pouring mechanism to form test mold, use the test mold to cast test castings, after casting, test the three-dimensional size and relative position degree of the typical structure of the test castings, obtain the space size and position degree data, calculate the structure feature shrinkage and relative position twist offset;

[0036] Step S104, formal wax mold 11 design, according to the results of step S104 calculation, correct and perform reverse deformation test, complete the shape, size and contour design of formal wax mold 11;

[0037] Step S105, formal mold group design, combine multiple formal wax molds 11 and pouring mechanism, design the size, cotton wrapping and mold shell of the pouring mechanism, the pouring mechanism includes T-shaped blind riser 26 to improve the rigidity of the blade;

[0038] Step S106, formal wax mold 11 shell, formal casting and iterative optimization with formal mold group, make the formal mold group designed in step S105, use shell material to wrap formal wax mold 11 to form a mold shell, after removing formal wax mold 11, assemble mold shell with pouring mechanism to form formal mold, use the obtained formal mold for pouring, constantly adjust the casting parameters during casting of formal castings until the low vortex working blade castings that meet the size and material standards are obtained.

[0039] Specifically, in step S102, simulation software is used for simulation test, which can compare different design options to find the best parameters of the test mold group, including the position and size of T-shaped blind riser 26, sprue and cooling channel. The simulation software can also provide visualization tools, allowing engineers to clearly see the filling and cooling process of the model, which helps to identify potential problems and improve the design. This helps to improve the quality of the model and reduce the waste rate. Improve production efficiency, reduce cost and improve the quality of the final product.

[0040] Further, step S106 is a practical process in which the designer can further refine the scheme and better control the casting process.

[0041] In one embodiment, the wax mold includes tenon 101, root 102, rim 103, blade body 104, blade crown 105 and blade sealing tooth 106, in step S101, the size of tenon 101, root 102, rim 103, blade body 104, blade crown 105 and blade sealing tooth 106 when the shrinkage is zero is extracted.

[0042] Specifically, it can be ensured that the finally manufactured parts or products have very precise dimensions, and it can be ensured that multiple parts produced in large quantities have consistent dimensions and shapes, which is crucial for the interchangeability and consistency of products.

[0043] In one embodiment, in step S101, the test wax mold 10 is made of the same material as the formal wax mold 11, and the sizes of the tenon 101, the root 102, the rim plate 103, the blade body 104, the blade crown 105, and the blade sealing teeth 106 are recorded under blue light or three coordinates.

[0044] Specifically, blue light measurement has the advantages of non-contact, speed, high precision, and three-dimensional measurement, and three-coordinate measurement has the advantages of high precision, multi-functionality, large size, and traceability. In the specific implementation process, appropriate measurement methods can be selected according to factors such as measurement accuracy, measurement speed, and the size and shape of the measured object to ensure that accurate size data is obtained for quality control and manufacturing process improvement.

[0045] In one embodiment, in step S102, the test mold group design includes the size design of a single test wax mold and a pouring mechanism, which includes a sprue cup 21, a middle sprue pipe 22, a base 23, a runner plate 24, and a runner combination 25.

[0046] In one embodiment, in step S102, the parameters of the sizes of the middle sprue pipe 22, the base 23, the runner plate 24, and the runner combination 25 are simulated using casting software such as Procast, and the positions of porosity generated under the condition of sufficient pouring are recorded and optimized, and the software optimization does not need to pay attention to defects.

[0047] Specifically, sufficient pouring can reduce the risk of casting defects such as pores, porosity, and slag inclusion, because the casting material can fill all the gaps in the mold, avoiding the mixing of air or slag, which is a crucial step in the casting process, which helps us to exclude the problems caused by insufficient pouring and faster find out the problems in the test process.

[0048] In one embodiment, in step 103, the three-dimensional size and relative position degree of the test casting typical structure tenon 101, root 102, rim plate 103, blade body 104, blade crown 105, and blade sealing teeth 106 are tested, and the corresponding spatial size and position degree are obtained, and then the shrinkage rate of the tenon 101, root 102, rim plate 103, blade body 104, blade crown 105, and blade sealing teeth 106 structure features and the relative position twist offset are calculated.

[0049] Specifically, after the successful production of the blade by the test mold in the test process, precise measurement of the size, dimensions, and position of the blade is required to produce high-precision blades.

[0050] Further, the shrinkage and relative position twist offset are key parameters for controlling and adjusting the dimensions and positions of the parts to ensure that the final product meets the design requirements.

[0051] In one embodiment, in step S104, according to the shrinkage and relative position twist offset of tenon 101, tenon root 102, rim plate 103, blade body 104, blade crown 105 and blade sealing teeth 106 structure features calculated in step S103, the feature structures are corrected and tested for deformation, and the design of the formal wax mold size is completed.

[0052] Specifically, the correction test is mainly used to solve the size and shape problems, while the reverse deformation test is mainly used to verify the performance and reliability of the product. These two methods play an important role in different stages and different applications, which can help manufacturers and engineers improve product quality, reduce cost and find problems in advance.

[0053] In one embodiment, in step S105, the formal mold module design includes the size design of the formal wax mold, the middle injection tube 22, the base 23, the runner plate 24, the runner combination 25 and the blind riser 26, the cotton design and the mold shell design.

[0054] In one embodiment, in step S105, the size of the middle injection tube 22, the base 23, the runner plate 24 and the runner combination 25 is determined according to experience and simulation software, and the elongation of the T-shaped area of the T-shaped blind riser 26 relative to the blade crown 105 is designed according to 2 times the recrystallization or fracture position of the blade body in step S103, or other appropriate size.

[0055] Specifically, when the casting metal cools and solidifies, it will shrink. This shrinkage can cause internal stresses, especially in thin-walled parts or parts with uneven thickness of the casting. These stresses can cause cracks or shape changes. The T-shaped blind riser 26 is installed on the blade crown 105 of the blade. The T-shaped blind riser 26 is a channel that connects the wax mold to the wax mold runner. It ensures that the molten wax can flow evenly into the entire model, filling every part to avoid the formation of voids or air bubbles. By designing the size and shape of the T-shaped blind riser 26, the speed of molten wax flowing into the model can be controlled to ensure that the model is fully filled, while avoiding excessive waste of molten wax. The T-shaped blind riser 26 can also be used to expel air or bubbles inside the model to avoid defects or uneven results during casting. In this embodiment, the T-shaped blind riser 26 is connected to the runner of the runner combination 25, which is where the liquid metal is poured into the model. This ensures that the metal can flow smoothly into the entire model, filling the cavities in the model.

[0056] In one embodiment, in step S106, the iterative optimization includes: iteratively optimizing the wax mold shell, cotton design, constantly adjusting the pouring parameters, shell preheating parameters, and finally obtaining a low vortex working blade casting with metallurgical size meeting the drawing and material standards.

[0057] Specifically, by adjusting the pouring parameters and shell preheating parameters, the casting process can be improved, the product quality can be improved, the cost can be reduced, the scrap rate can be reduced, and the process stability can be improved.

[0058] Specifically, during the trial process, using one mold shell is generally more economical than using multiple mold shells, as only one mold shell needs to be manufactured and maintained, and it is easier to manage. Moreover, the operation of one mold shell is relatively simple, as only one mold shell needs to be handled, without the need to consider the coordination between two mold shells. Finally, using one mold shell allows for faster loading and unloading, thereby improving production efficiency. During the production process, using multiple mold shells allows for higher production efficiency, as one mold shell can be prepared while the other mold shell is being tested, thereby reducing downtime. Moreover, using multiple mold shells can shorten the trial and production cycle, as one mold shell can continue to operate while the other mold shell is being loaded and unloaded. Multiple mold shells allow for continuous operation, thereby enabling continuous production and testing, which is particularly suitable for applications requiring high throughput. Finally, multiple mold shells provide redundancy, as if one mold shell fails or needs to be repaired, the other mold shell can still continue to operate, thereby reducing production interruptions.

[0059] Specific test steps:

[0060] Step S101, design of a trial wax mold 10 for the casting method of a low-vortex working blade. According to the shrinkage rate of zero, the dimensions of the tenon 101, the root extension 102, the rim plate 103, the blade body 104, the blade crown 105, and the blade sealing teeth 106 are designed, and the trial wax mold 10 of the low-vortex working blade is processed using milling processing. At this time, the wax mold material used is consistent with the material used in the later formal wax mold 11. The actual dimensions of the designed trial wax mold 10 need to be recorded under blue light or three coordinates.

[0061] Step S102, design of a trial mold set for the casting method of a low-vortex working blade. The trial mold set for a single low-vortex working blade includes the trial wax mold 10, the sprue cup 21, the middle injection pipe 22, the base 23, the runner plate 24, and the runner combination 25. The dimensions of the sprue cup 21, the middle injection pipe 22, the base 23, the runner plate 24, and the runner combination 25 can be simulated in casting simulation software such as Procast. During the simulation process, the location of the porosity generated under the condition of full pouring is recorded, but the defects of the wax mold do not need to be concerned at this stage.

[0062] Step S103, the test wax mold shell casting of the casting method of the low-vortex working blade and the size measurement of the casting. After the test mold group design is completed in step 102, the test wax mold 10 is wrapped with a shell material to form an external mold shell. The mold shell and the pouring mechanism are assembled to form a test mold for casting in the subsequent process, and the test casting is obtained. Then, the structure such as the tenon 101, the root 102, the rim plate 103, the blade body 104, the blade crown 105 and the blade sealing tooth 106 of the test casting is measured in three dimensions and the relative position degree is measured to obtain the corresponding spatial size and position degree. Then, the structure feature shrinkage of the tenon 101, the root 102, the rim plate 103, the blade body 104, the blade crown 105 and the blade sealing tooth 106 and the relative position torsion offset are calculated.

[0063] Step S104, the design of the formal wax mold 11 of the casting method of the low-vortex working blade. According to the three-dimensional shrinkage of the structure features of the tenon 101, the root 102, the rim plate 103, the blade body 104, the blade crown 105 and the blade sealing tooth 106 and the relative position torsion offset obtained in step S103, the feature structure is corrected and deformed, and the size design of the formal wax mold 11 is completed.

[0064] Step S105, the design of the formal mold group of the casting method of the low-vortex working blade. The size design, cotton wrapping design and mold shell design of the formal wax mold 11, the middle injection pipe 22, the base 23, the runner plate 24, the runner combination 25 and the T-shaped blind riser 26 are completed. The sizes of the middle injection pipe 22, the base 23, the runner plate 24 and the runner combination 25 can be set according to experience and simulation software. The blind riser 26 is installed on the formal wax mold 11, and the extension of the T-shaped region of the T-shaped blind riser 26 relative to the blade crown 105 is designed to be 2 times the recrystallization or fracture position of the blade body 104 in step S103. Alternatively, the T-shaped region can be designed according to other suitable sizes.

[0065] Step S106, the formal wax mold shell casting of the casting method of the low-vortex working blade and the iterative optimization of the casting parameters. After the formal mold group design is completed in step S105, the formal wax mold 10 is wrapped with a shell material to form an external mold shell, and the mold shell and the pouring mechanism are assembled to form a formal mold. The obtained formal mold is used for pouring, and the pouring parameters and the mold shell preheating parameters are continuously adjusted and iteratively optimized to finally obtain a blade casting that meets the drawing and material standards.

[0066] Specifically, the cotton wrapping design can select to add an insulating material, usually asbestos or ceramic fiber cotton, in the mold to isolate the mold shell and the mold and prevent excessive heat transfer and protect the mold surface from high-temperature corrosion.

[0067] The present application has the following beneficial effects:

[0068] 1. Method for optimizing the structure of a wax block for machining a blade: The present invention proposes a method for optimizing the structure of a wax block for machining a blade. This method aims to quickly obtain the three-dimensional structure and features of the blade, while taking into account the shrinkage problem. By placing the shrinkage according to different structural features, the size and shape of the casting can be better controlled, which helps to improve the mold preparation and casting size control.

[0069] 2. Innovative design of T-shaped blind riser: The present invention proposes an innovative design method for blind riser, which aims to solve the problem of blade crown porosity. This method not only helps to reduce the blade crown porosity, but also improves the rigidity of the blade near the blade crown area by designing a "T-shaped" blind riser. This helps to improve the deformation coordination between the blade crown and the blade, and reduces the stress concentration in the specific area of the blade, thereby reducing the stress of the blade.

[0070] 3. Casting of low-vortex blades suitable for aero-engine: The present invention proposes a low-vortex blade casting scheme suitable for aero-engine low-vortex working blade castings. This scheme has high consistency and is expected to have broad application prospects in the aviation field, as it can improve the quality, performance and production efficiency of the castings.

[0071] In the description of the present application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. Techniques, methods and devices known to those skilled in the relevant art may not be discussed in detail, but should be considered as part of the authorized description, if appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0072] It should be noted that in the present application, the "tenon" refers to the connecting part at the root of the blade, and the "root extension" is adjacent to the tenon and is used to connect and fix the support of the blade. In the present application, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. It should also be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0073] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the "connection", "drive" and similar words used in the description of the present application should be understood in a broad sense, which can be direct or through an intermediate medium, and can also be the relationship between two elements inside, and those skilled in the art can understand its specific meaning in the present application according to the specific circumstances.

[0074] The above embodiments are provided to those skilled in the art to implement or use the present application, and those skilled in the art can make various modifications or changes to the above embodiments without departing from the application idea of the present application, therefore the protection scope of the present application is not limited by the above embodiments, but should be the maximum scope meeting the innovative features mentioned in the claims.

Claims

1. A casting method for low-vortex working blades, characterized in that, The casting method of the low-vortex working blade includes: Step S101, test wax model design: Design the shape, size and outline of the test wax model according to the required shape, size and outline of the blade, and produce a test wax model that matches the required blade by milling. Step S102, test module design: Assemble the single test wax model designed in step S101 with the casting mechanism into a test module, design the dimensions of the casting mechanism, and simulate and optimize it in software; Step S103: Test wax mold shell making, test casting together with test module. After casting is completed, test casting is obtained, and the typical structure of test casting is tested for three-dimensional dimensions and relative positional accuracy to obtain spatial dimension and positional accuracy data, and the structural characteristic shrinkage rate and relative positional torsional offset are calculated. Step S104: Formal wax model design. Based on the results of step S103, correction and reverse deformation tests are conducted to complete the design of the shape, size and contour of the formal wax model. Step S105, formal module design, combining multiple formal wax molds and casting mechanisms, designing the dimensions, insulation and mold shell of the casting mechanism, the casting mechanism includes T-type concealed risers to improve blade rigidity; Step S106: Formal wax model shell making, formal casting and iterative optimization together with formal module, continuously adjusting casting parameters until a low-vortex working blade casting that meets size and material standards is obtained.

2. The casting method for low-vortex working blades according to claim 1, characterized in that, In step S101, the wax model includes a tenon, extension root, edge plate, blade body, leaf crown, and blade sealing teeth. The dimensions of the tenon, extension root, edge plate, blade body, leaf crown, and blade sealing teeth are extracted when the shrinkage rate is zero.

3. The casting method for low-vortex working blades according to claim 2, characterized in that, In step S101, the experimental wax model is made of the same material as the formal wax model, and the dimensions of the tenon, extension root, edge plate, blade, crown, and blade sealing teeth are recorded under blue light or a three-coordinate system.

4. The casting method for low-vortex working blades according to claim 3, characterized in that, In step S102, the test module design includes the size design of a single test wax model and the pouring mechanism. The pouring mechanism includes a pouring cup, a central pouring pipe, a base, a runner plate, and a runner assembly.

5. The casting method for low-vortex working blades according to claim 4, characterized in that, In step S102, the parameters of the dimensions of the injection tube, base, gating plate and gating system are simulated using Procast casting software to ensure that the filling is complete. The location of porosity is recorded and optimized. Defects are not considered during the software simulation.

6. The casting method for low-vortex working blades according to claim 4, characterized in that, In step S103, the three-dimensional dimensions and relative positional accuracy of the tenons, extension roots, rim plates, blade bodies, blade crowns, and blade sealing teeth of the typical structure of the test casting are tested to obtain the corresponding spatial dimensions and positional accuracy. Then, the structural characteristic shrinkage rate and relative positional torsional offset of the tenons, extension roots, rim plates, blade bodies, blade crowns, and blade sealing teeth are calculated.

7. The casting method for low-vortex working blades according to claim 6, characterized in that, In step S104, based on the shrinkage rate and relative position torsional offset of the tenon, extension root, edge plate, blade, blade crown and blade sealing tooth structure features calculated in step S103, the feature structures are corrected and reversed to complete the design of the formal wax model size.

8. The casting method for low-vortex working blades according to claim 4, characterized in that, In step S105, the formal module design includes the size design of multiple formal wax molds and the injection tube, base, sprue plate, sprue assembly and T-type concealed riser, cotton wrapping design and mold shell design.

9. The casting method for low-vortex working blades according to claim 8, characterized in that, In step S105, the dimensions of the inlet pipe, base, gating plate and gating assembly are determined based on experience and simulation software. The elongation of the T-shaped area of ​​the T-shaped dark riser relative to the blade crown is designed to be twice the recrystallization or fracture location of the blade in step S103.

10. The casting method for low-vortex working blades according to claim 8, characterized in that, In step S106, iterative optimization includes: iteratively optimizing the wax mold shell making and cotton wrapping design, continuously adjusting the casting parameters and shell preheating parameters, and finally obtaining a low-vortex working blade casting whose metallurgical dimensions meet the drawings and material standards.

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