Spherical radar radome building method and double-layer positioning tool thereof

Abstract

The invention relates to a construction technology of a radar radome, in particular to a construction and positioning technology of a high-precision radar radome, and particularly relates to a construction method of a spherical radar radome. Comprising the steps that 1, an internal positioning tool is built and used for providing basic positioning and supporting of the spherical radar radome; 2, building an external positioning tool based on the internal positioning tool, and arranging the external positioning tool according to a preset spherical contour to form a spherical frame; and step 3, building the radar radome based on the external positioning tool, and completing building of the spherical radar radome. According to the method, through three-dimensional software modeling and precise calculation of the size of the positioning tool in the tool, precise positioning of the whole positioning tool is achieved; by means of the double-layer positioning tool, high-precision positioning and stable supporting of the radar radome are achieved, the manufacturing process is effectively simplified, the positioning precision and the manufacturing efficiency are improved, and meanwhile the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to a radar antenna cover construction technology, and in particular to a high-precision radar antenna cover construction and positioning technology, and in particular to a spherical radar antenna cover construction method and a double-layer positioning tooling thereof. Background Art

[0002] With the rapid development of radar technology, the operating frequency of radar antenna equipment is gradually moving towards high frequency and broadband. Due to its performance limitations, traditional dielectric radomes can no longer meet the stringent requirements of high-frequency and broadband 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 transportability of the entire radome and the limitations of the rod size, the block structure is difficult to achieve. Therefore, the integral spherical space truss structure is widely used.

[0003] At present, the commonly used spherical space truss structures are Figure 1 and Figure 2 As shown, it mainly includes 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 has five grooves 11 evenly distributed along the radial direction and is arranged from bottom to top at the spherical node. The corner point plate 1 at the bottom of the sphere is embedded in the groove through the connecting rod 4 and then welded to the circular base rod 3, while a plurality of arc-shaped rods 2 are embedded in the groove 11 of the corner point plate 1 of the spherical node to form a spherical space truss. These arc-shaped rods 2 are fixed to the corner point plate 1 of the spherical node by welding. However, since the corner point plate is arranged on the spherical surface as a spatial structure, its spatial positioning is extremely difficult, resulting in many difficulties in the production process of the spherical space truss, poor spherical forming effect, low production efficiency and high cost.

[0004] In order to improve this situation, relevant technicians have been constantly exploring. For example, the invention of Chinese Patent No. 202010292998.2 proposes a large-span single-layer space ellipsoid antenna truss and a manufacturing and installation method. Although this method achieves precise positioning of the antenna through a complex multi-layer structure design, its implementation process is extremely cumbersome and requires multiple steps such as finite element analysis, GPS equipment calibration, and total station measurement. These steps need to be repeated, which greatly increases the difficulty and cost of making the spherical space truss, resulting in low production efficiency.

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

[0006] The present invention is proposed based on the above background technology, and it proposes a method for building a spherical radar antenna cover and a double-layer positioning tool. Through the use of the double-layer positioning tool, high-precision positioning and stable support of the radar antenna cover are achieved, which effectively simplifies the production process, improves positioning accuracy and production efficiency, and reduces manufacturing costs.

[0007] In order to achieve the above object, the present invention is achieved in the following ways: A method for constructing a spherical radar antenna cover, comprising: 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 tooling includes a plurality of tooling angle plates 5, a plurality of tooling beams 6 and a plurality of tooling bases 7; The tooling angle plate 5 has five legs 51 evenly distributed along the radial direction, and each 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 tooling beams 6 are connected to the five legs 51 of the tooling angle plates 5 by 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 tooling bases 7 by pins to form a stable internal support structure; Several tooling angle plates 5 form spherical nodes; The external positioning tooling includes 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 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 the five grooves 11 of a plurality of corner plates 1 to form a spherical space truss, and the plurality of arc-shaped rods 2 are fixed to the corner plates 1 of the spherical nodes by welding; The horizontal plate 72 of the tooling base 7 is fixed to the circular basic rod 3 through at least three first pin holes 721 and pins, so as to realize the positioning of a plurality of corner plates 1, a plurality of arc rods 2 and the circular basic rod 3 in the spherical space truss.

[0008] In the above-mentioned method for constructing the spherical radar antenna cover, the tooling beam 6 is a channel steel, and at least two second pin holes 61 are respectively provided at two ends thereof to improve the stability and strength of the connection with the tooling angle plate 5 .

[0009] In the method for building the spherical radar antenna cover, 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 tooling 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 is fixed to the circular basic rod 3 by welding the connecting rod 4 or other connecting methods to complete the overall construction of the radar antenna cover.

[0010] The method for constructing the spherical radar antenna cover is as follows: after the construction of the radar antenna cover is completed, it can be selected whether to remove the internal positioning tooling as needed; If the internal positioning tool needs to be removed, the connecting pins between the tool angle plate 5, the tool beam 6 and the tool base 7 are pulled out, and other related connecting parts are removed to obtain a complete spherical radar antenna cover.

[0011] Furthermore, the present invention also proposes a design method for the above-mentioned double-layer positioning tooling, comprising: S1. According to the external dimensions of the spherical radar antenna cover, determine the dimensions of the internal positioning tool, including the tooling angle plate 5, the tooling beam 6 and the tooling base 7, and the external positioning tool, including the dimensions of the corner point plate 1, the arc rod 2 and the circular base rod 3; S2. Determination of 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, to ensure that the internal positioning tooling can stably support the internal structure of the radar antenna cover; S3, the determination of the size of the external positioning tooling includes: according to the external contour of the radar antenna cover, designing the position and number of the corner point plates 1, and the length and curvature of the arc rod 2, 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 tooling and the external positioning tooling, determine the cross-sectional dimensions of the tooling beam 6 and the arc-shaped rod 2, as well as the specific structure and dimensions of the corner point plate 1 and the tooling corner plate 5 to meet the strength and stability requirements of the positioning tooling.

[0012] Furthermore, in the above-mentioned high-precision double-layer positioning tooling design method for the spherical radar antenna cover: The radial distribution of the tooling angle plate 5 of the internal positioning tooling and the length of the support legs 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 of easy assembly.

[0013] Furthermore, in the above-mentioned high-precision double-layer positioning tooling design method for the spherical radar antenna cover: The position and quantity 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 .

[0014] Furthermore, the high-precision double-layer positioning tooling design method of the spherical radar antenna cover is as follows: 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 the comprehensive consideration of material cost and processing difficulty; The specific structure and size of the corner point plate 1 and the tooling angle plate 5 are determined based on the reliability of the connection method and the requirements of easy operation.

[0015] The advantages and characteristics of the method for constructing the spherical radar antenna cover proposed in the present invention are: 1) The internal positioning framework lays a solid foundation: The internal positioning frame is composed of tooling angle plates, tooling beams, and tooling base components, providing a stable basic positioning and support for the construction of the radar antenna cover; The coordinated 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 convenient measurement effect for the subsequent external positioning frame, especially the fixation and positioning of the angle point plate; The detachable design of the internal positioning frame allows it to be easily removed after all operations are completed without affecting the subsequent use of the radar antenna cover.

[0016] 2) The double-layer framework of the internal positioning framework and the external positioning framework works together: During the construction process, the internal positioning frame and the external positioning frame work together to form a temporary and stable support structure for the radar antenna cover; the internal frame provides basic support, while the external frame ensures the high precision and shape accuracy of the radar antenna cover 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 is coordinated with the tooling corner plate of the internal frame, and the final shape and accuracy of the radar antenna cover are ensured through precise measurement and positioning.

[0017] Thanks to the collaborative work of the above-mentioned double-layer frame, the stability and reliability of the radar antenna cover during the construction process are ensured; this design makes the construction process smoother and reduces errors and deviations caused by structural instability.

[0018] In summary, this technical solution achieves high-precision construction of the radar antenna cover through the use of double-layer positioning tooling. Its multiple beneficial effects, such as stable basic positioning, precise positioning and shaping during construction, structural stability and adaptability, improved construction efficiency and quality, and long-term reliability and maintainability, are mutually progressive and together constitute the core advantages of the technical solution. In particular, the coordinated design of the tooling beam and the corner plate, as well as the precise positioning and fixing method of the corner point plate, provide great convenience and accuracy for the construction of the radar antenna cover, making the entire construction process smoother and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the spherical space truss structure.

[0020] Figure 2 Schematic diagram of the corner point disk in the spherical space truss structure.

[0021] Figure 3 It is a structural schematic diagram of the internal positioning frame in the present invention.

[0022] Figure 4 It is a schematic diagram of the tooling angle plate in the present invention.

[0023] Figure 5 It is a schematic diagram of the tooling base in the present invention.

[0024] Figure 6 It is a schematic diagram of the tooling beam in the present invention.

[0025] Figure 7 It is a schematic diagram of the construction method of the spherical radar antenna cover shown in the present invention. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] Example 1 Example 1 introduces the process of building a spherical radar antenna cover with a diameter of 5 meters by using the method for building a spherical radar antenna cover shown in the present invention, which specifically includes: 1. Design of double-layer positioning bracket 1. 3D software modeling process Before the actual production of the double-layer positioning bracket, first use 3D modeling software (such as SolidWorks, CATIA, etc.) to perform accurate design modeling. The modeling process mainly includes the following steps: Establish basic geometric model: According to the size and shape of the radar antenna cover, establish a spherical basic geometric model as a reference for subsequent design.

[0028] Designing tooling angle plates 5: Inside the spherical model, according to the required support points and positioning accuracy, design and arrange 5 tooling angle plates 5. Five support legs 51 are evenly distributed along the radial direction on each tooling angle plate, and a first positioning pin hole 52 is provided on the support legs.

[0029] Calculate the length of the tooling beam 6: According to the number and position of the tooling angle plates 5, use the measurement and calculation functions of the 3D software to accurately calculate the length of the tooling beam 6. Ensure that the tooling beam 6 can connect the adjacent tooling angle plates 5 to form a part of the sphere, and the length is moderate, neither too long nor too short.

[0030] Design tooling base 7: Design tooling base 7 according to the connection mode and bearing capacity requirements of tooling beam 6. Tooling base 7 is composed of vertical plate 71 and horizontal plate 72, which are used to fix with the ground and provide stable support for the entire internal positioning tooling.

[0031] Assembly and verification: In the three-dimensional software, the tooling angle plate 5, the tooling beam 6 and the tooling base 7 are virtually assembled to check the matching between the various components to ensure that the internal positioning tooling after assembly can meet the design requirements.

[0032] 2. Internal positioning tooling design details Tooling angle plate 5: As mentioned above, 5 tooling angle plates are designed, and their radial distribution and leg length are accurately calculated based on the internal curvature of the radar antenna cover and the number of required support points.

[0033] Tooling beam 6: A channel steel is selected as the tooling beam, and two second pin holes 61 are respectively provided at both ends thereof, 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.

[0034] Tool base 7: An inverted T-shaped tool base consisting of a vertical plate 71 and a horizontal plate 72 is made to be fixed to the ground and provide stable support for the entire internal positioning tool.

[0035] 3. External positioning tooling design On the basis of the internal positioning tooling, the external positioning tooling is designed. The external positioning tooling is composed of a corner plate 1, an arc rod 2 and a circular base rod 3.

[0036] Corner point plate 1: According to the external contour of the radar antenna cover and the accuracy requirements of the required positioning points, the corner point plate is designed and manufactured. The corner point plate surface is provided with third positioning pin holes 12 at intervals, which are fixed to the tooling corner plate 5 of the internal positioning tooling by pins to ensure the precise docking of the external positioning tooling with the internal positioning tooling.

[0037] Arc rods 2: According to the spherical profile of the radar antenna cover and the fitting accuracy requirements of the arc rods, several arc rods are designed and manufactured. The arc rods are respectively embedded in the five grooves 11 of the corner plate 1 to form a spherical space truss. The arc rods are fixed to the corner plate 1 of the spherical node by welding to ensure the stability of the spherical space truss.

[0038] Circular basic rod 3: The circular basic rod is made, and its diameter and height are determined according to the bottom size and support requirements of the radar antenna cover. The circular basic rod is fixed to the horizontal plate 72 of the tooling base 7 by pins to provide bottom support for the spherical space truss.

[0039] 2. Assembly and construction of double-layer positioning tooling 1. Internal positioning tooling construction First, build the internal positioning tooling according to the design requirements. Connect the tooling angle plate 5 to form a part of the sphere through the tooling beam 6, and fix it to the ground through the tooling base 7. During the construction process, ensure that the radial distribution and leg length of the tooling angle plate 5 meet the design requirements, and the connection method of the tooling beam 6 is firm and reliable.

[0040] 2. External positioning tooling assembly After the internal positioning tooling is completed, the external positioning tooling is assembled. The corner plate 1 is fixed to the tooling corner plate 5 of the internal positioning tooling by pins to form a spherical node. Then, the arc rod 2 is embedded in the groove 11 of the corner plate 1 and fixed to the corner plate 1 by welding. Finally, the circular base rod 3 is fixed to the horizontal plate 72 of the tooling base 7 by pins to complete the assembly of the external positioning tooling.

[0041] 3. Preparation for collaborative work of double-layer positioning tooling Check whether the overall structure of the double-layer positioning fixture is stable and whether the connections between the components are firm and reliable. Ensure that the internal positioning fixture and the external positioning fixture cooperate with each other to form a stable support structure and provide high-precision and accurate shape support for the construction of the radar antenna cover.

[0042] 3. Radome Construction Process After the double-layer positioning tooling is completed, the construction of the radar antenna cover begins.

[0043] 1. Fixing of shell parts The shell components of the radar antenna cover are fixed one by one on the arc-shaped rod 2 of the external positioning tool by welding, pin riveting or nut and bolt bolting. During the fixing process, ensure that the shell components and the arc-shaped rod are closely fitted and firmly connected.

[0044] 2. Fixed bottom structure At the bottom of the spherical radar antenna cover, the bottom structure of the radar antenna cover is fixed to the circular basic rod 3 by welding the connecting rod 4 or other connection methods. After the fixing is completed, check whether the connection is firm and reliable.

[0045] 3. Overall inspection and adjustment After the overall construction of the radar antenna cover is completed, the entire structure is comprehensively inspected. Check the connection of each component, the flatness of the shell components, the accuracy of the spherical contour, etc. If necessary, adjust and correct the parts that do not meet the requirements.

[0046] Through the above embodiments, it can be seen that the construction method of the spherical radar antenna cover and the double-layer positioning tooling thereof proposed in the present invention have significant advantages and characteristics.

[0047] First, through 3D software modeling and precise calculation of the tooling beam length, accurate positioning of the internal positioning tooling was achieved. Through the use of double-layer positioning tooling, high-precision positioning and stable support of the radar antenna cover were achieved, which effectively simplified the production process, improved positioning accuracy and production efficiency, and reduced manufacturing costs.

[0048] Secondly, it can be seen from the above embodiments that the present invention also has the following advantages: 1. Simplify the construction process and improve efficiency: The design of double-layer positioning tooling simplifies the construction process of the radar antenna cover and reduces the difficulty of construction.

[0049] The coordinated design of the tooling beam and the corner plate, as well as the precise positioning and fixing methods of the corner plate, have greatly simplified the construction steps and improved construction efficiency.

[0050] 2. Ensure build quality and improve performance: The high-precision construction method of the double-layer positioning tooling ensures the construction quality of the radar antenna cover.

[0051] The high-quality construction enables the radar antenna cover to better meet the performance requirements of the radar system and improves the performance of the entire radar system.

[0052] Precise measurement and positioning reduce errors and deviations during the construction process, further improving the accuracy and stability of the radar antenna cover.

[0053] 3. Easy to maintain and reliable structure: Although the internal positioning frame needs to be dismantled after construction is completed, the design of the independent external positioning frame based on existing technology ensures the stability and reliability of the radar antenna cover during long-term use.

[0054] The solid connection and reasonable structural 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 antenna cover to withstand various forces in the external environment and during use, and maintain the stability of its shape and precision.

[0055] At the same time, the detachable internal positioning frame design also facilitates subsequent maintenance and replacement work, reducing maintenance costs and time.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still 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 is fixed to the circular basic rod (3) by welding connecting rods (4) or other connection methods, thereby completing 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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