A method for forming a composite spherical segment component

Abstract

This invention relates to a method for molding a composite spherical cap part, comprising the following steps: S1, preparing materials: cutting material sheets to obtain multiple domes, multiple first melon-shaped segments, and multiple second melon-shaped segments; S2, laying: S21, applying a release agent to a female mold, then laying a dome on the mold, then overlapping multiple first melon-shaped segments around the circumference of the dome, with the first melon-shaped segments aligned with the dome, at which point the dome and the multiple first melon-shaped segments form a first layup; at least two layers of the first layup are continuously laid on the outermost side of the left half of the dome; S23, overlapping multiple second melon-shaped segments around the circumference of the dome, at which point the multiple second melon-shaped segments form a second layup; at least two layers of the second layup are continuously laid; S25, repeating S21, at least two layers of the first layup are continuously laid on the innermost side of the left half of the dome; S3, curing; S4, demolding to obtain the left half of the dome; repeating S2 to S4 above to obtain the right half of the dome, and splicing the left half of the dome and the right half of the dome to form a spherical cap part.

Description

Technical Field

[0001] This invention belongs to the field of aerospace technology, and in particular relates to a method for forming composite spherical segments. Background Technology

[0002] A portion of a sphere that is cut off by a plane is called a spherical notch, such as... Figure 1 As shown, radar domes (antenna radomes) for high-speed missiles and high-speed aircraft, as well as the nose caps of aerospace fairings, are all spherical segments. Radomes and nose caps can solve problems caused by high temperatures and aerodynamic loads. With the development of technology and the increase in flight speed, the requirements for radomes and nose caps are becoming more stringent. In order to improve efficiency and increase carrying capacity, their weight must be as light as possible while ensuring rigidity and strength.

[0003] Currently, most spherical segment products are manufactured using composite materials. Due to their large size and curvature, placement and positioning are difficult, resulting in low efficiency and difficulty in controlling the shape after installation. Because they are subjected to significant stress, a large number of layers are required. How to overlap and buttock these layers to ensure strength while meeting the required thickness in the assembly area is a challenge. Furthermore, these spherical segment products need to withstand high temperatures, necessitating the selection of high-temperature resistant materials. However, the curing process of these materials generates a large amount of small molecules, which, if not promptly removed, will affect the molding quality. Additionally, during curing, the circulating air inside the autoclave directly blows onto the sealing strip, causing vacuum leakage. Ensuring the rigidity, assembly thickness, weight, molding pressure, installation quality, and molding efficiency of spherical segment products are all problems that urgently need to be solved. Summary of the Invention

[0004] To address the problems in existing technologies regarding how to ensure the rigidity, assembly thickness, weight, laying quality, and molding efficiency of spherical segment products, this invention provides a method for molding composite spherical segment parts.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: a method for forming a composite spherical cap component, wherein the spherical cap component includes a left half cover and a right half cover with the same structure, the left half cover includes multiple first ply layers and multiple second ply layers, the shapes of the first ply layers and the second ply layers are matched with the shape of the left half cover, and the multiple first ply layers and the multiple second ply layers are laid sequentially along the radial direction of the cross section of the spherical cap component.

[0006] The method for forming the composite spherical segment includes the following steps:

[0007] Step 1: Prepare materials: Cut the prepreg material into multiple dome-shaped pieces, multiple first melon segments, and multiple second melon segments;

[0008] Step 2, Laying:

[0009] Step 21: Apply a release agent to the negative mold, then place one of the domes on the mold, and then overlap multiple pieces of the first melon petals around the circumference of the dome in sequence, with the end of the first melon petal close to the dome abutting against the dome. At this time, the dome and the multiple pieces of the first melon petals form the first layup.

[0010] Step 22: Repeat step 21, applying at least two consecutive layers of the first layup to the outermost part of the left half of the cover;

[0011] Step 23: Overlap multiple pieces of the second melon slices around the circumference of the dome, and cover the end of the second melon slices near the dome with the dome of the first layer. At this time, multiple pieces of the second melon slices form the second layer.

[0012] Step 24: Repeat step 23, applying at least two consecutive layers of the second layup;

[0013] Step 25: Repeat step 21 to apply at least two consecutive layers of the first layup on the innermost side of the left half of the cover;

[0014] Step 3, Curing: Place the female mold into an autoclave for curing;

[0015] Step 4, Demolding: After demolding, the left half of the cover is obtained;

[0016] During the laying process in step 2, at least one layer must be compacted after each layer is laid.

[0017] Repeat steps 2 to 4 above to obtain the right half cover. Then, assemble the left half cover and the right half cover to form the spherical part.

[0018] Preferably, the compaction process in step 2 is as follows: First, a release cloth, a porous release membrane, a breathable felt, and a vacuum bag are sequentially placed above the layup. A non-porous release membrane is placed between the release cloth and the female mold, a dry glass fabric is placed between the breathable felt and the release cloth, and a dry glass fabric is also placed between the breathable felt and the vacuum bag. An air guide chain is placed between the inner dry glass fabric and the breathable felt, and a vacuum nozzle is placed between the outer dry glass fabric and the breathable felt. The non-porous release membrane, dry glass fabric, air guide chain, and vacuum nozzle are all located on the periphery of the effective area of ​​the layup. A sealing strip is placed between the periphery of the vacuum bag and the female mold. Porous separator membranes, breathable felt, and dry glass fabric provide excellent air conduction and exhaust. Volatile small molecules can pass through the porous separator membrane, while the dry glass fabric effectively prevents the breathable felt from being flattened during the vacuuming process, thus preventing the internal gas from being unable to escape in time and forming a false vacuum. This reduces the occurrence of non-destructive defects in the parts and significantly improves the quality of the parts. Non-porous separator membranes are used in the prepreg process, making it easy to peel the vacuum bag off the product. At the same time, it makes it easier to move the vacuum bag on the product and reduces the possibility of the vacuum bag "bridging" in corners. In addition, a layer of non-porous separator membrane is placed in the allowance area and edges of the parts to effectively prevent resin overflow of the prepreg and avoid resin deficiency in the parts, thereby ensuring the quality of the parts.

[0019] Preferably, during the paving process in step 2, the first layer is compacted after paving, and subsequent layers are compacted after every 3 to 5 layers.

[0020] Furthermore, multiple thermocouples are installed on the female mold, positioned close to the laying area and located inside a vacuum bag; in step 21, after applying a release agent to the female mold, it is preheated at 60°C for 30 minutes. Thermocouples measure the product temperature during the curing process, allowing it to rise and fall according to a fixed curing curve; heating the prepreg during the laying process enhances its viscosity, facilitating improved laying quality and efficiency.

[0021] Furthermore, target points are set on the female mold. In step 2, the target points and a laser projector are used to position the dome, the first lobe, and the second lobe. This helps to solve the problems of difficult positioning and easy error in laying large-size composite spherical parts.

[0022] Preferably, the seams between adjacent first plies, between adjacent first and second plies, and between adjacent second plies are staggered; the overlap between a subsequent first ply and a preceding first ply is 1 / 3 to 2 / 3; the overlap between a subsequent second ply and a preceding second ply is 1 / 3 to 2 / 3. This ensures the connection strength between adjacent first plies; ensures the connection strength between adjacent second plies; ensures the overall connection strength between the left and right halves of the cover; and ensures the pressure-bearing capacity of the spherical cap component.

[0023] Furthermore, the overlap between the first segment of the later piece and the first segment of the earlier piece is 1 / 2; the overlap between the second segment of the later piece and the second segment of the earlier piece is also 1 / 2. This facilitates fabrication and ensures the connection strength between adjacent first segments, with no thickness difference in the first layup of the same layer; it also ensures the connection strength between adjacent second segments, with no thickness difference in the second layup of the same layer, ensuring the overall connection strength between the left and right halves of the cover, and significantly improving the pressure-bearing capacity of the spherical cap component.

[0024] Furthermore, for the first layer, a replacement melon petal is superimposed on the unoverlapping portions of the first and last segments of the first melon petal; similarly, for the second layer, a replacement melon petal is superimposed on the unoverlapping portions of the first and last segments of the second melon petal. This ensures the connection strength between the left and right halves of the cover, reduces processing allowance, and saves materials.

[0025] Furthermore, in step 2: the outermost first ply is laid inwards with at least two layers of the second ply, and then at least two more layers of the first ply are laid outwards with at least two more layers of the second ply. The outermost and innermost sides of the left half-cover are each provided with at least two layers of the first ply. The first ply adopts a dome-shaped structure with a first petal, which ensures the integrity of the top of the spherical cap component, thereby improving its resistance to airflow impact and pressure bearing capacity. It also ensures the flatness of the dome-shaped ply after curing, maintaining the good aerodynamic shape of the spherical cap component.

[0026] Furthermore, the first ply has 8 layers, and the second ply has 28 layers, arranged from the outside to the inside as follows: 2 layers of the first ply, 2 layers of the second ply, 2 layers of the first ply, 24 layers of the second ply, 2 layers of the first ply, 2 layers of the second ply, and 2 layers of the first ply. The first ply adopts a dome-shaped structure with a first petal, and its reasonable layout ensures the integrity of the top of the spherical segment, thereby improving its resistance to airflow impact and its pressure-bearing capacity. It also ensures the flatness of the dome ply after curing, maintaining the good aerodynamic shape of the spherical segment. The total number of the first and second ply layers can be set according to the actual application scenario.

[0027] Beneficial effects:

[0028] 1. The composite spherical segment molding method of the present invention comprises a first layup using a dome-plus-first-petal-shaped layup, wherein the first layup consists of multiple first petals sequentially overlapping around the circumference of the dome, with the end of the first petal near the dome abutting against the dome; the second layup consists of multiple second petals sequentially overlapping around the circumference of the dome, with the dome of the first layup covering the end of the second petal near the dome; and the layout of the first and second layups is reasonable and ingenious, with the left and right halves of the dome having the same structure spliced ​​together to form the spherical segment, which not only ensures the integrity of the top of the spherical segment, improves the resistance to thermal shock, and improves the pressure bearing capacity, but also ensures the flatness of the dome after curing and maintains the good aerodynamic shape of the spherical segment. This molding method is simple and ingenious, easy to implement, has high molding quality, and low cost.

[0029] 2. In the composite spherical segment molding method of the present invention, during the prepreg laying process, at least one layer is compacted after each layer is laid. Compaction is also performed before the negative mold is placed in the autoclave for curing. The porous release membrane, breathable felt, and dry glass fabric play a good role in guiding and venting air. Volatile small molecules can pass through the porous release membrane, and the dry glass fabric effectively prevents the breathable felt from being flattened during the vacuuming process of the vacuum bag, which would prevent the internal gas from being discharged in time and form a false vacuum, thereby reducing the generation of non-destructive defects in the part and greatly improving the part quality. The non-porous release membrane used in the prepreg process makes it easy to peel the vacuum bag off the product. At the same time, it makes it easier to move the vacuum bag on the product and reduces the possibility of the vacuum bag "bridging" at the corner. In addition, a non-porous release membrane is set in the excess area and edge of the part to effectively prevent the resin of the prepreg from overflowing and avoid the part being depleted, thereby ensuring the part quality. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional structural diagram of the spherical segment of the composite spherical segment forming method of the present invention;

[0032] Figure 2 This is a three-dimensional structural schematic diagram of the female mold in the composite spherical part forming method of the present invention;

[0033] Figure 3 This is a cross-sectional schematic diagram of the compaction operation in the composite spherical defect forming method of the present invention;

[0034] Figure 4This is a three-dimensional structural diagram of the first layup of the composite spherical defect forming method of the present invention;

[0035] Figure 5 This is a three-dimensional structural diagram of the second layup in the composite spherical defect forming method of the present invention;

[0036] Figure 6 This is a partial cross-sectional schematic diagram of the right half of the cover of the composite spherical defect forming method of the present invention;

[0037] In the diagram: 1. Spherical cap component; 1-1. Left half cover; 1-2. Right half cover; 1-21. First layup; 1-211. Dome; 1-212. First petal; 1-213. Filler petal; 1-22. Second layup; 1-221. Second petal; 1-3. Connector; 2. Female mold; 3. Adhesive release cloth; 4. Release cloth; 5. Perforated release film; 6. Breathable felt; 7. Vacuum bag; 8. Non-perforated release film; 9. Dry glass fabric; 10. Air guide chain; 11. Vacuum nozzle; 12. Sealing strip; 13. Thermocouple; 14. Target point. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example

[0040] like Figures 1-6 As shown, a method for forming a composite spherical cap component 1 is described, wherein the spherical cap component 1 includes a left half-cover 1-1 and a right half-cover 1-2 with identical structures, as shown. Figure 1 , 4 As shown in Figures 5 and 6, the left half cover 1-1 includes multiple first ply 1-21 and multiple second ply 1-22. The shapes of the first ply 1-21 and the second ply 1-22 are matched with the shape of the left half cover 1-1. The multiple first ply 1-21 and the multiple second ply 1-22 are laid radially along the cross section of the spherical cap component 1.

[0041] The method for forming the composite spherical segment includes the following steps:

[0042] Step 1: Prepare materials: Cut the prepreg material into multiple dome pieces 1-211, multiple first melon pieces 1-212, and multiple second melon pieces 1-221;

[0043] Step 2, Laying:

[0044] Step 21: Apply a release agent to the female mold 2 and attach a layer of adhesive release cloth 3. Then, place one of the dome 1-211 on the mold. Then, overlap multiple pieces of the first melon petal 1-212 around the circumference of the dome 1-211 in sequence. The end of the first melon petal 1-212 near the dome 1-211 is connected to the dome 1-211. At this time, the dome 1-211 and the multiple pieces of the first melon petal 1-212 form the first layup 1-21.

[0045] Step 22: Repeat step 21, and apply at least two consecutive layers of the first layup 1-21 to the outermost side of the left half cover 1-1;

[0046] Step 23: The multiple second melon petals 1-221 are overlapped around the dome 1-211 in sequence, and the dome 1-211 of the first layer 1-21 covers the end of the second melon petal 1-221 near the dome 1-211. At this time, the multiple second melon petals 1-221 form the second layer 1-22.

[0047] Step 24: Repeat step 23, laying at least two consecutive layers of the second layup 1-22;

[0048] Step 25: Repeat step 21, and apply at least two consecutive layers of the first layup 1-21 to the innermost side of the left half cover 1-1;

[0049] Step 3, Curing: Place the female mold 2 into an autoclave for curing;

[0050] Step 4, Demolding: After demolding, the left half of the cover 1-1 is obtained;

[0051] During the laying process in step 2, at least one layer must be compacted after each layer is laid.

[0052] Repeat steps 2 to 4 above to obtain the right half cover 1-2. Then, splice the left half cover 1-1 and the right half cover 1-2 together using connector 1-3 to form the spherical cap component 1. By adopting a radial half-structure splicing method and using integral reinforcement at the top of the convergence, the load-bearing capacity of the spherical cap component 1 is greatly improved.

[0053] To facilitate the resolution of air venting and vacuum leakage issues during compaction and curing, in this embodiment, during the laying process in step 2, compaction is performed after the first layer is laid, and after every 3 to 5 subsequent layers. Compaction is also performed before curing in step 3. The compaction process in step 2 is as follows: Figure 3As shown, a release cloth 4, a porous isolation membrane 5, a breathable felt 6, and a vacuum bag 7 are sequentially arranged above the layup. A non-porous isolation membrane 8 is arranged between the release cloth 4 and the female mold 2. A dry glass fabric 9 is arranged between the breathable felt 6 and the release cloth 4. A dry glass fabric 9 is also arranged between the breathable felt 6 and the vacuum bag 7. An air guide chain 10 is arranged between the inner dry glass fabric 9 and the breathable felt 6. A vacuum nozzle 11 is arranged between the outer dry glass fabric 9 and the breathable felt 6. The vacuum nozzle 11 is connected to the air guide chain 10. The non-porous isolation membrane 8, the dry glass fabric 9, the air guide chain 10, and the vacuum nozzle 11 are all located on the periphery of the effective area of ​​the layup. A sealing strip 12 is arranged between the periphery of the vacuum bag 7 and the female mold 2. The porous separator 5, the breathable felt 6, and the dry glass fabric 9 provide excellent air conduction and exhaust. Volatile small molecules can pass through the porous separator 5, and the dry glass fabric 9 effectively prevents the breathable felt 6 from being flattened during the vacuuming process of the vacuum bag 7, thus preventing the internal gas from being unable to escape in time and forming a false vacuum. This reduces the occurrence of non-destructive defects in the parts and significantly improves the quality of the parts. The non-porous separator 8 is used in the prepreg process, which makes it easy to peel the vacuum bag 7 off the product. At the same time, it makes it easier to move the vacuum bag 7 on the product and reduces the possibility of the vacuum bag 7 "bridging" in the corners. In addition, a layer of non-porous separator 8 is set in the allowance area and edge of the parts to effectively prevent the resin of the prepreg from overflowing and avoid the parts being depleted, thereby ensuring the quality of the parts.

[0054] Specifically, in this embodiment, such as Figure 2 As shown, the female mold 2 is equipped with target points 14. In step 2, the target points 14 and a laser projector are used to position the dome 1-211, the first melon segment 1-212, and the second melon segment 1-221. Multiple thermocouples 13 are installed on the female mold 2, positioned close to the laying area and located inside the vacuum bag 7. In step 21, after applying a release agent to the female mold 2, it is preheated at 60°C for 30 minutes. Thermocouples 13 measure the product temperature during the curing process, allowing it to rise and fall according to a fixed curing curve. Heating the prepreg during the laying process enhances its viscosity, facilitating improved laying quality and efficiency.

[0055] Specifically, in this embodiment, such as Figure 4 , 5As shown in Figure 6, the seams between adjacent first ply 1-21, between adjacent first ply 1-21 and second ply 1-22, and between adjacent second ply 1-22 are all staggered; the overlap range between the next first ply 1-212 and the previous first ply 1-212 is 1 / 3 to 2 / 3; the overlap range between the next second ply 1-221 and the previous second ply 1-221 is 1 / 3 to 2 / 3; at least two layers of first ply 1-21 are laid inward from the outermost first ply 1-21, with a gap of at least two layers of second ply 1-22, and at least two layers of first ply 1-21 are laid outward from the innermost first ply 1-21, with a gap of at least two layers of second ply 1-22, and at least two layers of first ply 1-21 are laid outward from the innermost first ply 1-21, with a gap of at least two layers of second ply 1-22. The first ply 1-21; further, in this embodiment, the overlap between the next piece of the first ply 1-212 and the previous piece of the first ply 1-212 is 1 / 2; the overlap between the next piece of the second ply 1-221 and the previous piece of the second ply 1-221 is 1 / 2; the number of layers of the first ply 1-21 is 8, and the number of layers of the second ply 1-22 is 28. From the outside to the inside, they are 2 layers of the first ply 1-21, 2 layers of the second ply 1-22, 2 layers of the first ply 1-21, 24 layers of the second ply 1-22, 2 layers of the first ply 1-21, 2 layers of the second ply 1-22, and 2 layers of the first ply 1-21, as shown in Table 1. The ply numbers are sequentially increased from the outside to the inside. The total number of first ply 1-21 and second ply 1-22 can be set according to the actual application scenario. The first ply 1-21 adopts a dome 1-211 plus first petal 1-212 laying structure, and the first ply 1-21 is reasonably laid out with an angle of ±45°. The 45° angle ensures the integrity of the top of the spherical segment 1, thereby improving its resistance to airflow impact and its pressure bearing capacity. It also ensures the flatness of the dome 1-211 after curing and maintains the good aerodynamic shape of the spherical segment 1. The second layup 1-22 has an angle of 0° / 90° and 90° / 0°, and the force is along the fiber direction, which can maximize the performance advantages of the prepreg.

[0056]

[0057] Table 1. Layout of First and Second Ply Layers

[0058] To ensure the connection strength between the left half-cover 1-1 and the right half-cover 1-2, reduce machining allowances, and save materials, in this embodiment, as follows: Figure 4As shown, in the first layer 1-21, the first and last segments of the first melon petal 1-212 that do not overlap are each covered with a replacement melon petal 1-213; in the second layer 1-22, the first and last segments of the second melon petal 1-221 that do not overlap are also each covered with a replacement melon petal 1-213.

[0059] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for forming a composite spherical segment, characterized in that: The spherical cap component (1) includes a left half-cover (1-1) and a right half-cover (1-2) with the same structure. The left half-cover (1-1) includes multiple first plies (1-21) and multiple second plies (1-22). The shapes of the first plies (1-21) and the second plies (1-22) are matched with the shape of the left half-cover (1-1). The multiple first plies (1-21) and the multiple second plies (1-22) are laid sequentially along the radial direction of the cross section of the spherical cap component (1). The method for forming the composite spherical segment includes the following steps: Step 1: Prepare materials: Cut the prepreg material into multiple dome pieces (1-211), multiple first melon pieces (1-212), and multiple second melon pieces (1-221). Step 2, Laying: Step 21: Apply a release agent to the negative mold (2), then place one of the domes (1-211) on the mold, and then overlap multiple pieces of the first melon petals (1-212) around the circumference of the dome (1-211). The end of the first melon petal (1-212) near the dome (1-211) is connected to the dome (1-211). At this time, the dome (1-211) and the multiple pieces of the first melon petals (1-212) form the first layup (1-21). Step 22: Repeat step 21 to apply at least two consecutive layers of the first layup (1-21) on the outermost side of the left half cover (1-1). Step 23: Overlap multiple second melon petals (1-221) around the dome (1-211) in sequence, and the dome (1-211) of the first layer (1-21) covers the end of the second melon petal (1-221) near the dome (1-211). At this time, multiple second melon petals (1-221) form the second layer (1-22). Step 24: Repeat step 23, applying at least two consecutive layers of the second layup (1-22). Step 25: Repeat step 21 to lay at least two consecutive layers of the first layup (1-21) on the innermost side of the left half cover (1-1). Step 3, Curing: Place the female mold (2) into an autoclave for curing; Step 4, Demolding: After demolding, the left half of the cover (1-1) is obtained. During the laying process in step 2, at least one layer must be compacted after each layer is laid. Repeat steps 2 to 4 above to obtain the right half cover (1-2). Then, splice the left half cover (1-1) and the right half cover (1-2) together to form the spherical part (1). The seams between adjacent first ply (1-21), between adjacent first ply (1-21) and second ply (1-22), and between adjacent second ply (1-22) are all staggered; the overlap range between the next first ply (1-212) and the previous first ply (1-212) is 1 / 3 to 2 / 3; the overlap range between the next second ply (1-221) and the previous second ply (1-221) is 1 / 3 to 2 / 3. The overlap between the first melon segment (1-212) of the next piece and the first melon segment (1-212) of the previous piece is 1 / 2; the overlap between the second melon segment (1-221) of the next piece and the second melon segment (1-221) of the previous piece is 1 / 2.

2. The method for forming composite spherical segment parts according to claim 1, characterized in that: The compaction process in step 2 is as follows: First, release cloth (4), porous isolation film (5), breathable felt (6) and vacuum bag (7) are set on the top of the layup in sequence. A non-porous isolation film (8) is set between the release cloth (4) and the female mold (2). A dry glass fabric (9) is set between the breathable felt (6) and the release cloth (4). A dry glass fabric (9) is also set between the breathable felt (6) and the vacuum bag (7). An air guide chain (10) is set between the inner dry glass fabric (9) and the breathable felt (6). A vacuum nozzle (11) is set between the outer dry glass fabric (9) and the breathable felt (6). The non-porous isolation film (8), dry glass fabric (9), air guide chain (10) and vacuum nozzle (11) are all located outside the effective area of ​​the layup. A sealing strip (12) is set between the outer periphery of the vacuum bag (7) and the female mold (2).

3. The method for forming composite spherical segment parts according to claim 1, characterized in that: During the tiling process in step 2, the first layer is compacted after tiling, and subsequent layers are compacted after every 3 to 5 layers.

4. The method for forming composite spherical segment parts according to claim 2 or 3, characterized in that: Multiple thermocouples (13) are set on the female mold (2), the thermocouples (13) are set close to the laying area, and the thermocouples (13) are located in the vacuum bag (7); in step 21, after applying the release agent to the female mold (2), it is preheated at 60°C for 30 minutes.

5. The method for forming composite spherical segment parts according to claim 1, 2 or 3, characterized in that: The negative mold (2) is provided with target points (14). In step 2, the target points (14) and the laser projector are used to position the dome (1-211), the first melon petal (1-212) and the second melon petal (1-221).

6. The method for forming composite spherical segment parts according to claim 1, characterized in that: In the first layer (1-21), the first and last segments of the first melon petal (1-212) that do not overlap are each covered with a replacement melon petal (1-213); in the second layer (1-22), the first and last segments of the second melon petal (1-221) that do not overlap are also each covered with a replacement melon petal (1-213).

7. The method for forming composite spherical segment parts according to claim 1, 2 or 3, characterized in that: In step 2: the outermost first ply (1-21) is laid inward with at least two layers of the second ply (1-22) and then at least two layers of the first ply (1-21) are laid outward with at least two layers of the second ply (1-22) and then at least two layers of the first ply (1-21) are laid outward with at least two layers of the second ply (1-22).

8. The method for forming composite spherical segment parts according to claim 7, characterized in that: The first ply (1-21) has 8 layers, and the second ply (1-22) has 28 layers. From the outside to the inside, they are 2 layers of the first ply (1-21), 2 layers of the second ply (1-22), 2 layers of the first ply (1-21), 24 layers of the second ply (1-22), 2 layers of the first ply (1-21), 2 layers of the second ply (1-22), and 2 layers of the first ply (1-21).

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