A construction method of a spherical radome and its double-layer positioning tooling

Abstract

The present invention relates to the construction technology of a radar radome, specifically to the construction and positioning technology of a high-precision radar radome, and specifically to a method for building a spherical radar radome; it includes Step 1, building an internal positioning tooling for providing basic positioning and support for the spherical radar radome; Step 2, building an external positioning tooling based on the internal positioning tooling, and the external positioning tooling is arranged according to a predetermined spherical contour to form a spherical framework; Step 3, building the radar radome based on the external positioning tooling to complete the building of the spherical radar radome. The present invention realizes the precise positioning of the entire positioning tooling through three-dimensional software modeling and precise calculation of the dimensions of the internal positioning tooling; through the use of a double-layer positioning tooling, it realizes the high-precision positioning and stable support of the radar radome, effectively simplifies the manufacturing process, improves the positioning accuracy and manufacturing efficiency, and at the same time reduces the manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the construction technology of radar radomes, specifically to the construction and positioning technology of high-precision radar radomes, and particularly to a method for building a spherical radar radome and its double-layer positioning tooling. Background Art

[0002] With the rapid development of radar technology, the operating frequency of radar antenna equipment is gradually moving towards high frequency and wide frequency. Due to the limitations of its performance, traditional dielectric radomes are difficult to meet the stringent requirements of high-frequency and wide-frequency radar antennas. In contrast, metal truss radomes have become the first choice to meet this demand due to their superior performance. For metal truss radomes with a diameter of less than 3 meters, due to the limitations of the transportability of the overall radome and the dimensions of the rods, a segmented structure is difficult to achieve. Therefore, an integral spherical space truss structure is widely used.

[0003] Currently, the commonly used spherical space truss structures such as Figure 1 and Figure 2 as shown, mainly include several corner plates 1, several arc-shaped rods 2 and circular foundation rods 3. The corner plates 1 are evenly distributed with five grooves 11 along the radial direction and are arranged at the spherical nodes from bottom to top. The corner plates 1 at the bottom of the sphere are welded to the circular foundation rods 3 through connecting rods 4 embedded in the grooves, and several arc-shaped rods 2 are embedded in the grooves 11 of the corner plates 1 at the spherical nodes to form a spherical space truss. These arc-shaped rods 2 are fixed to the corner plates 1 at the spherical nodes by welding. However, since the corner plates are arranged on the sphere as a spatial structure, its spatial positioning is extremely difficult, resulting in great difficulties in the manufacturing process of the spherical space truss, poor spherical forming effect, low manufacturing efficiency and high cost.

[0004] To improve this situation, relevant technical personnel have continuously explored. For example, the invention with Chinese patent number 202010292998.2 proposes a large-span single-layer space ellipsoidal antenna truss and its manufacturing and installation method. Although this method realizes the precise positioning of the antenna through a complex multi-layer structure design, its implementation process is extremely cumbersome, requiring multiple steps such as finite element analysis, GPS device calibration, total station measurement, etc., and these steps need to be repeated, greatly increasing the manufacturing difficulty and cost of the spherical space truss and resulting in low manufacturing efficiency.

[0005] Therefore, the main problems existing in the prior art are: the manufacturing process of the spherical space truss is complex, the positioning is difficult, the manufacturing efficiency is low and the cost is high. These problems seriously restrict the wide application and development of spherical radar radomes. Summary of the Invention

[0006] The present invention is proposed based on the above-mentioned background technology, and it provides a method for building a spherical radome and a double-layer positioning tooling therefor. By using the double-layer positioning tooling, high-precision positioning and stable support of the radome are achieved, effectively simplifying the manufacturing process, improving the positioning accuracy and manufacturing efficiency, and reducing the manufacturing cost at the same time.

[0007] To achieve the above object, the present invention is implemented as follows:

[0008] A method for building a spherical radome includes

[0009] Step 1, building an internal positioning tooling, which is used to provide basic positioning and support for the spherical radome;

[0010] Step 2, building an external positioning tooling based on the internal positioning tooling. The external positioning tooling is arranged according to a predetermined spherical contour to form a spherical framework;

[0011] Step 3, building the radome based on the external positioning tooling. The components of the radome are fixed to the external positioning tooling by a fixing method of welding, or riveting by pins, or bolting by nuts and bolts, to complete the building of the spherical radome;

[0012] Among them,

[0013] The internal positioning tooling includes a plurality of tooling angle plates 5, a plurality of tooling beams 6 and a plurality of tooling bases 7;

[0014] The tooling angle plate 5 is evenly distributed with five supporting feet 51 in the radial direction. At least two first positioning pin holes 52 are spaced apart on each supporting foot 51 for connecting with the tooling beam 6 and / or other tooling angle plates 5;

[0015] The tooling base 7 is an inverted T-shaped member composed of a vertical plate 71 and a horizontal plate 72. At least two second positioning pin holes 711 are spaced apart on the vertical plate 71. At least three first pin holes 721 are spaced apart on both sides of the vertical plate 71 of the horizontal plate 72 for fixing with the tooling beam 6 and / or the ground;

[0016] Both ends of a plurality of tooling beams 6 are connected to the five supporting feet 51 of a plurality of tooling angle plates 5 by pins to form a part of the spherical surface. One supporting foot 51 of the bottom tooling angle plate 5 is connected to the vertical plate 71 of a plurality of tooling bases 7 by pins to form a stable internal support structure;

[0017] A plurality of tooling angle plates 5 form spherical surface nodes;

[0018] The external positioning tooling includes a plurality of corner plates 1, a plurality of arc-shaped members 2 and a circular foundation member 3;

[0019] The corner plate 1 is provided with third positioning pin holes 12 at intervals on the plate surface, and is fixed to a number of tooling corner plates 5 through pins;

[0020] A number of arc-shaped rods 2 are respectively embedded in five grooves 11 of a number of corner plates 1 to form a spherical space truss, and the number of arc-shaped rods 2 and the corner plates 1 of the spherical nodes are fixed by welding;

[0021] The cross plate 72 of the tooling base 7 is fixed to the circular foundation rod 3 through at least three first pin holes 721 and pins, so as to realize the positioning of a number of corner plates 1, a number of arc-shaped rods 2 and the circular foundation rod 3 in the spherical space truss.

[0022] For the above-mentioned method of building a spherical radome, the tooling beam 6 is a channel steel, and at least two second pin holes 61 are respectively opened at intervals at both ends thereof to improve the connection stability and strength with the tooling corner plate 5.

[0023] For the above-mentioned method of building a spherical radome, in step 3, when building the radome, first fix the shell components of the radome on the arc-shaped rods 2 of the external positioning tooling by means of welding or riveting through pins or bolting through nuts and bolts;

[0024] Then, at the bottom of the spherical radome, fix the bottom structure of the radome to the circular foundation rod 3 by welding the connecting rod 4 or other connection methods to complete the overall construction of the radome.

[0025] For the above-mentioned method of building a spherical radome: after the construction of the radome is completed, it can be selected whether to remove the internal positioning tooling according to needs;

[0026] If it is necessary to remove the internal positioning tooling, pull out the connecting pins between the tooling corner plate 5, the tooling beam 6 and the tooling base 7, and remove other relevant connecting components to obtain a complete spherical radome.

[0027] Furthermore, the present invention also proposes a design method for the above double-layer positioning tooling, including

[0028] S1. According to the outer dimensions of the spherical radome, determine the internal positioning tooling, including the dimensions of the tooling corner plate 5, the tooling beam 6 and the tooling base 7, and the external positioning tooling, including the dimensions of the corner plate 1, the arc-shaped rod 2 and the circular foundation rod 3;

[0029] S2. The determination of the dimensions of the internal positioning tooling includes: according to the internal space requirements of the radome, design the radial distribution and the length of the support feet 51 of the tooling corner plate 5, as well as the length and connection method of the tooling beam 6 to ensure that the internal positioning tooling can stably support the internal structure of the radome;

[0030] S3. The determination of the dimensions of the external positioning tooling includes: according to the external contour of the radar radome, designing the position and quantity of the corner plates 1, as well as the length and curvature of the arc-shaped rods 2, to ensure that the external positioning tooling can accurately simulate the spherical contour of the radar radome;

[0031] S4. According to the design requirements of the internal positioning tooling and the external positioning tooling, determine the cross-sectional dimensions of the tooling beams 6 and the arc-shaped rods 2, as well as the specific structures and dimensions of the corner plates 1 and the tooling corner plates 5, so as to meet the strength and stability requirements of the positioning tooling.

[0032] Furthermore, in the above-mentioned high-precision double-layer positioning tooling design method for the spherical radar radome:

[0033] The determination of the radial distribution of the tooling corner plates 5 and the length of the support feet 51 of the internal positioning tooling is carried out based on the internal curvature of the radar radome and the number of required support points;

[0034] The determination of the length and connection method of the tooling beams 6 is carried out based on the load-bearing capacity of the tooling beams 6 and the requirement of easy assembly.

[0035] Furthermore, in the above-mentioned high-precision double-layer positioning tooling design method for the spherical radar radome:

[0036] The determination of the position and quantity of the corner plates 1 of the external positioning tooling is carried out based on the external contour of the radar radome and the accuracy requirements of the required positioning points;

[0037] The determination of the length and curvature of the arc-shaped rods 2 is carried out based on the fitting accuracy of the arc-shaped rods 2 and the requirement of easy processing.

[0038] Furthermore, the above-mentioned high-precision double-layer positioning tooling design method for the spherical radar radome:

[0039] The determination of the cross-sectional dimensions of the tooling beams 6 and the arc-shaped rods 2 is carried out based on the overall strength and stability requirements of the positioning tooling, as well as the comprehensive consideration of material cost and processing difficulty;

[0040] The determination of the specific structures and dimensions of the corner plates 1 and the tooling corner plates 5 is carried out based on the reliability of the connection method and the requirement of easy operation.

[0041] The advantages and characteristics of the above-mentioned construction method for the spherical radar radome proposed by the present invention are as follows:

[0042] 1). The internal positioning framework lays a solid foundation:

[0043] The internal positioning framework is composed of tooling corner plates, tooling beams, and tooling base components, providing a stable basic positioning and support for the construction of the radar radome;

[0044] The cooperative design of the tooling beam and the tooling angle plate not only forms a part of the spherical surface, but also provides an accurate reference and a measurable effect for the subsequent external positioning frame, especially for the fixation and positioning of the corner point plate;

[0045] The detachable design of the internal positioning frame enables easy removal after all operations are completed, without affecting the subsequent use of the radome.

[0046] 2) The double-layer frames of the internal positioning frame and the external positioning frame work together:

[0047] During the construction process, the internal positioning frame and the external positioning frame cooperate with each other to jointly form a temporary stable support structure for the radome. Among them, the internal frame provides the basic support, and the external frame ensures the high precision and shape accuracy of the radome during the construction process through its precise layout and reasonable structural design. On this basis, the external positioning frame is precisely arranged according to the predetermined spherical contour, and the design of the corner point plate cooperates with the tooling angle plate of the internal frame. Through precise measurement and positioning, the final shape and accuracy of the radome are ensured.

[0048] Thanks to the cooperation of the above double-layer frames, the stability and reliability of the radome during the construction process are ensured. This design makes the construction process smoother and reduces errors and deviations caused by structural instability.

[0049] In summary, through the use of the double-layer positioning tooling, this technical solution realizes the high-precision construction of the radome. The multiple beneficial effects such as the stable basic positioning, precise positioning and shaping during the construction process, structural stability and adaptability, improvement of construction efficiency and quality, and reliability and maintainability during long-term use are progressive to each other and jointly constitute the core advantages of the technical solution. Especially the cooperative design of the tooling beam and the angle plate, as well as the precise positioning and fixation method of the corner point plate, provide great convenience and accuracy for the construction of the radome, making the entire construction process smoother and more efficient. Brief Description of the Drawings

[0050] Figure 1 It is a schematic diagram of a spherical space truss structure.

[0051] Figure 2 It is a schematic diagram of the corner point plate in the spherical space truss structure.

[0052] Figure 3 It is a schematic diagram of the structure of the internal positioning frame in the present invention.

[0053] Figure 4 It is a schematic diagram of the tooling angle plate in the present invention.

[0054] Figure 5 It is a schematic diagram of the tooling base in the present invention.

[0055] Figure 6 This is a schematic diagram of the tooling beam in the present invention.

[0056] Figure 7 This is a schematic diagram of the construction method of the spherical radome shown in the present invention. Detailed implementation manners

[0057] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific implementation manners, structures, features and their effects of the present invention as follows.

[0058] Embodiment 1

[0059] Embodiment 1 describes the construction process of a spherical radome with a diameter of 5 meters completed by the construction method of the spherical radome shown in the present invention, which specifically includes:

[0060] I. Design of the double-layer positioning bracket

[0061] 1. 3D software modeling process

[0062] Before actually manufacturing the double-layer positioning bracket, first use 3D modeling software (such as SolidWorks, CATIA, etc.) for precise design and modeling. The modeling process mainly includes the following steps:

[0063] Establish a basic geometric model: According to the size and shape of the radome, establish a spherical basic geometric model as a reference for subsequent design.

[0064] Design the tooling angle plate 5: Inside the spherical model, design and arrange 5 tooling angle plates 5 according to the required support points and positioning accuracy. Five feet 51 are evenly distributed along the radial direction on each tooling angle plate, and first positioning pin holes 52 are opened on the feet.

[0065] Calculate the length of the tooling beam 6: According to the number and positions of the tooling angle plates 5, use the measurement and calculation functions of the 3D software to accurately calculate the length dimension of the tooling beam 6. Ensure that the tooling beam 6 can connect adjacent tooling angle plates 5 to form a part of the spherical surface, and the length is appropriate, neither too long nor too short.

[0066] Design the tooling base 7: According to the connection method and load-bearing capacity requirements of the tooling beam 6, design the tooling base 7. The tooling base 7 is composed of a vertical plate 71 and a horizontal plate 72, which is used to be fixed to the ground and provide stable support for the entire internal positioning tooling.

[0067] Assembly and calibration: In 3D software, the tooling angle plate 5, tooling beam 6 and tooling base 7 are virtually assembled to check the fit between components and ensure that the internal positioning tooling after assembly meets the design requirements.

[0068] 2. Design details of the internal positioning tooling

[0069] Tooling angle plate 5: As mentioned above, 5 tooling angle plates are designed, and their radial distribution and support leg lengths are accurately calculated according to the internal curvature of the radome and the number of required support points.

[0070] Tooling beam 6: Channel steel is selected as the tooling beam, and two second pin holes 61 are respectively opened at both ends at intervals and connected to the support legs 51 of the tooling angle plate through pins. The length of the tooling beam has been accurately calculated by 3D software to ensure that the spherical part after connection meets the design requirements.

[0071] Tooling base 7: A reverse T-shaped tooling base composed of a vertical plate 71 and a horizontal plate 72 is made for fixing to the ground and providing stable support for the entire internal positioning tooling.

[0072] 3. Design of the external positioning tooling

[0073] Based on the internal positioning tooling, an external positioning tooling is designed. The external positioning tooling consists of a corner point plate 1, an arc-shaped member 2 and a circular base member 3.

[0074] Corner point plate 1: According to the external contour of the radome and the accuracy requirements of the required positioning points, the corner point plate is designed and manufactured. Third positioning pin holes 12 are provided at intervals on the surface of the corner point plate and fixed to the tooling angle plate 5 of the internal positioning tooling through pins to ensure the precise docking of the external positioning tooling and the internal positioning tooling.

[0075] Arc-shaped member 2: According to the spherical contour of the radome and the fitting accuracy requirements of the arc-shaped member, several arc-shaped members are designed and manufactured. The arc-shaped members are respectively embedded in the five grooves 11 of the corner point plate 1 to form a spherical space truss. The arc-shaped member and the corner point plate 1 of the spherical node are fixed by welding to ensure the stability of the spherical space truss.

[0076] Circular base member 3: The circular base member is manufactured, and its diameter and height are determined according to the bottom size and support requirements of the radome. The circular base member is fixed to the horizontal plate 72 of the tooling base 7 through pins to provide bottom support for the spherical space truss.

[0077] II. Assembly and construction of the double-layer positioning tooling

[0078] 1. Construction of the internal positioning tooling

[0079] First, build the internal positioning tooling according to the design requirements. Connect the tooling corner plates 5 into a part of a spherical surface through the tooling beams 6, and fix them to the ground through the tooling base 7. During the building process, ensure that the radial distribution of the tooling corner plates 5 and the lengths of the support feet meet the design requirements, and the connection method of the tooling beams 6 is firm and reliable.

[0080] 2. Assembly of the external positioning tooling

[0081] After the internal positioning tooling is built, start assembling the external positioning tooling. Fix the corner point plate 1 to the tooling corner plate 5 of the internal positioning tooling through a pin to form a spherical node. Then, embed the arc-shaped rod 2 into the groove 11 of the corner point plate 1 and fix it to the corner point plate 1 by welding. Finally, fix the circular foundation rod 3 to the cross plate 72 of the tooling base 7 through a pin to complete the assembly of the external positioning tooling.

[0082] 3. Preparation for the coordinated work of the double-layer positioning tooling

[0083] Check whether the overall structure of the double-layer positioning tooling is stable and whether the connections of all components are firm and reliable. Ensure that the internal positioning tooling and the external positioning tooling cooperate with each other to jointly form a stable support structure, providing high-precision and accurately shaped support for the construction of the radome.

[0084] III. Process of building the radome

[0085] After the double-layer positioning tooling is built, start building the radome.

[0086] 1. Fixing of the shell components

[0087] Fix the shell components of the radome to the arc-shaped rod 2 of the external positioning tooling one by one through welding, pin riveting or nut and bolt connection. During the fixing process, ensure the close fit and firm connection between the shell components and the arc-shaped rod.

[0088] 2. Fixing of the bottom structure

[0089] At the bottom of the spherical radome, fix the bottom structure of the radome to the circular foundation rod 3 through a welding rod 4 or other connection methods. After fixing, check whether the connection is firm and reliable.

[0090] 3. Overall inspection and adjustment

[0091] After the overall construction of the radome is completed, conduct a comprehensive inspection of the entire structure. Check the connection conditions of all components, the flatness of the shell components, and the accuracy of the spherical contour, etc. If necessary, adjust and correct the parts that do not meet the requirements.

[0092] Through the above embodiments, it can be seen that the method for building the spherical radar radome and its double-layer positioning tooling proposed by the present invention have significant advantages and characteristics.

[0093] First, through three-dimensional software modeling and precise calculation of the length of the tooling beam, the precise positioning of the internal positioning tooling is achieved; by using the double-layer positioning tooling, the high-precision positioning and stable support of the radar radome are realized, effectively simplifying the manufacturing process, improving the positioning accuracy and manufacturing efficiency, and at the same time reducing the manufacturing cost.

[0094] Secondly, as can be seen from the above embodiments, the present invention also has the following advantages:

[0095] 1. Simplify the building process and improve efficiency:

[0096] The design of the double-layer positioning tooling simplifies the building process of the radar radome and reduces the building difficulty.

[0097] The cooperative design of the tooling beam and the corner plate, as well as the precise positioning and fixing method of the corner plate, greatly simplify the building steps and improve the building efficiency.

[0098] 2. Ensure the building quality and improve performance:

[0099] Through the high-precision building method of the double-layer positioning tooling, the building quality of the radar radome is ensured.

[0100] The high-quality building enables the radar radome to better meet the performance requirements of the radar system and improves the performance of the entire radar system.

[0101] Precise measurement and positioning reduce errors and deviations during the building process, further improving the accuracy and stability of the radar radome.

[0102] 3. Easy to maintain and reliable structure:

[0103] Although the internal positioning frame needs to be removed after the building is completed, the design of the external positioning frame that exists independently based on the existing technology ensures the stability and reliability of the radar radome during long-term use.

[0104] The firm connection and reasonable structure design of the external positioning frame, as well as the various fixing methods provided (such as welding, pin riveting, nut and bolt bolting, etc.), enable the radar radome to resist various forces in the external environment and during use, and maintain the stability of its shape and accuracy.

[0105] At the same time, the detachable internal positioning frame design also facilitates subsequent maintenance and replacement work, reducing the maintenance cost and time.

[0106] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above in its preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for constructing a spherical radar antenna cover, characterized in that: include Step 1: construct an internal positioning tool, wherein the internal positioning tool is used to provide basic positioning and support for the spherical radar antenna cover; Step 2: constructing an external positioning tool based on the internal positioning tool, wherein the external positioning tool is arranged according to a predetermined spherical contour to form a spherical frame; Step 3: Build the radar antenna cover based on the external positioning tooling, fix the components of the radar antenna cover on the external positioning tooling by welding, riveting with pins, or bolting with nuts and bolts, and complete the construction of the spherical radar antenna cover; in, The internal positioning tool comprises a plurality of tool angle plates (5), a plurality of tool beams (6) and a plurality of tool bases (7); The tooling angle plate (5) has five support legs (51) evenly distributed along the radial direction, and each support leg (51) is provided with at least two first positioning pin holes (52) at intervals, for connecting with the tooling beam (6) and / or other tooling angle plates (5); The tooling base (7) is an inverted T-shaped member consisting of a vertical plate (71) and a horizontal plate (72); the vertical plate (71) is provided with at least two second positioning pin holes (711) at intervals, and the horizontal plate (72) is provided with at least three first pin holes (721) at intervals on both sides of the vertical plate (71), respectively, for fixing to the tooling beam (6) and / or the ground; The two ends of the plurality of tooling beams (6) are connected to five legs (51) of the plurality of tooling angle plates (5) via pins to form a part of the spherical surface, and one leg (51) of the bottom tooling angle plate (5) is connected to the vertical plates (71) of the plurality of tooling bases (7) via pins to form a stable internal support structure; A plurality of tooling angle plates (5) form spherical nodes; The external positioning tooling comprises a plurality of corner point plates (1), a plurality of arc-shaped rods (2) and a circular base rod (3); The corner point plate (1) is provided with third positioning pin holes (12) at intervals on its plate surface and is fixed to a plurality of tooling corner plates (5) by pins; A plurality of arc-shaped rods (2) are respectively embedded in five grooves (11) of a plurality of corner point plates (1) to form a spherical space truss, and the plurality of arc-shaped rods (2) are fixed to the corner point plates (1) of the spherical nodes by welding; The horizontal plate (72) of the tooling base (7) is fixed to the circular base member (3) via at least three first pin holes (721) and pins, thereby achieving the positioning of a plurality of corner point plates (1), a plurality of arc-shaped members (2) and the circular base member (3) in the spherical space truss.

2. The method for constructing a spherical radar antenna cover according to claim 1, characterized in that: The tooling beam (6) is a channel steel, and at least two second pin holes (61) are provided at intervals at both ends thereof, so as to improve the stability and strength of the connection with the tooling angle plate (5).

3. The method for constructing a spherical radar antenna cover according to claim 1, characterized in that: In step 3, when building the radar antenna cover, firstly, the shell component of the radar antenna cover is fixed to the arc-shaped rod (2) of the external positioning tool by welding or riveting with pins or bolts; Then, at the bottom of the spherical radar antenna cover, the bottom structure of the radar antenna cover and the circular basic rod (3) are fixed by welding connecting rods (4) to complete the overall construction of the radar antenna cover.

4. The method for constructing a spherical radar antenna cover according to any one of claims 1 or 3, characterized in that: After the radar antenna cover is built, choose whether to remove the internal positioning tooling according to the needs; If the internal positioning fixture is removed, the connecting pins between the fixture angle plate (5), the fixture beam (6) and the fixture base (7) are pulled out, and other related connecting parts are removed to obtain a complete spherical radar antenna cover.

5. A design method for a double-layer positioning tool for building a spherical radar antenna cover, characterized by: include S1. According to the outer dimensions of the spherical radar antenna cover, determine the dimensions of the internal positioning tool, including the tool angle plate (5), the tool beam (6) and the tool base (7), and the dimensions of the external positioning tool, including the angle point plate (1), the arc rod (2) and the circular base rod (3); S2. Determining the size of the internal positioning tooling includes: designing the radial distribution of the tooling angle plate (5) and the length of the support foot (51), as well as the length and connection method of the tooling beam (6) according to the internal space requirements of the radar antenna cover, so as to ensure that the internal positioning tooling can stably support the internal structure of the radar antenna cover; S3, determining the size of the external positioning tooling includes: designing the position and number of the corner point plates (1) and the length and curvature of the arc-shaped rod (2) according to the external contour of the radar antenna cover, so as to ensure that the external positioning tooling can accurately simulate the spherical contour of the radar antenna cover; S4. According to the design requirements of the internal positioning fixture and the external positioning fixture, the cross-sectional dimensions of the fixture beam (6) and the arc-shaped rod (2), as well as the specific structure and dimensions of the corner point plate (1) and the fixture corner plate (5) are determined to meet the strength and stability requirements of the positioning fixture.

6. The design method of the double-layer positioning tooling for building a spherical radar antenna cover according to claim 5 is characterized by: The radial distribution of the tooling angle plate (5) of the internal positioning tooling and the length of the support feet (51) are determined based on the internal curvature of the radar antenna cover and the number of required support points; The length and connection method of the tooling beam (6) are determined based on the load-bearing capacity of the tooling beam (6) and the requirement for easy assembly.

7. The design method of the double-layer positioning tooling for building a spherical radar antenna cover according to claim 5 or 6 is characterized in that: The position and number of the corner point plates (1) of the external positioning tool are determined based on the external contour of the radar antenna cover and the accuracy requirements of the required positioning points; The length and curvature of the arc-shaped rod (2) are determined based on the requirements of the fitting accuracy and ease of processing of the arc-shaped rod (2).

8. The design method of the double-layer positioning tooling for building a spherical radar antenna cover according to claim 7 is characterized by: The cross-sectional dimensions of the tooling beam (6) and the arc-shaped rod (2) are determined based on the overall strength and stability requirements of the positioning tooling, as well as a comprehensive consideration of material cost and processing difficulty; The specific structure and size of the corner point plate (1) and the tooling corner plate (5) are determined based on the reliability of the connection method and the requirements for ease of operation.

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