Manufacturing process of composite material structural member

Abstract

The invention relates to a manufacturing process of a composite material structural part. The composite material structural member comprises an inner shell, a mounting base and a connecting piece, the connecting piece is connected between the inner shell and the mounting base, and the manufacturing method is characterized by comprising the following steps that a tool is sleeved with a first blank, a second blank is mounted on the tool, and a cavity is formed in the tool; winding one end of a strip-shaped composite material on the first green body, winding the other end of the strip-shaped composite material on the second green body, and accommodating the strip-shaped composite material in the cavity; the strip-shaped composite material is heated and cured, the strip-shaped composite material located in the cavity is converted into a connecting piece, the first blank wound with the strip-shaped composite material is converted into an inner shell, and the second blank wound with the strip-shaped composite material is converted into a mounting base; and the tool is unloaded from the inner shell, the mounting base and the connecting piece. Therefore, the manufacturing cost of composite material structural members such as the duct is reduced on the basis of ensuring the structural strength.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a manufacturing process for composite material structural components. Background Technology

[0002] With the continuous advancement of technology, drones have made significant progress in both military and civilian applications. Drones typically use free-running propellers for power, but these propellers generate considerable noise and suffer from low efficiency and safety. Improved drones utilize ducted propellers, which effectively block propeller noise, reducing its impact. Simultaneously, the duct protects the propeller from external impacts and wind forces, improving its safety and stability, and allowing it to generate greater thrust at the same input power. However, traditional composite material structures such as ducted propellers often suffer from lower structural strength and higher manufacturing costs. Summary of the Invention

[0003] One of the technical problems addressed by this application is how to reduce the manufacturing cost of composite material structural components while ensuring structural strength.

[0004] A manufacturing process for a composite material structural component, the composite material structural component including an inner shell, a mounting base, and a connector, wherein the connector is connected between the inner shell and the mounting base, the manufacturing method comprising the following steps:

[0005] The first blank is fitted onto the tooling, and the second blank is installed on the tooling, which is provided with a cavity;

[0006] One end of the strip-shaped composite material is wound around the first blank and the other end is wound around the second blank, and the strip-shaped composite material is housed in the cavity;

[0007] The strip-shaped composite material is heated and cured, transforming it into the connector within the cavity; the first preform wound with the strip-shaped composite material is transformed into the inner shell; and the second preform wound with the strip-shaped composite material is transformed into the mounting base.

[0008] The tooling is unloaded from the inner shell, the mounting base, and the connector.

[0009] In one embodiment, the tooling includes a side cylinder, a base, and a plurality of reinforcing ribs. The orthographic projection of the base along the axial direction of the side cylinder falls within the cavity enclosed by the side cylinder. The plurality of reinforcing ribs are spaced apart circumferentially along the side cylinder and are connected between the base and the side cylinder. The cavity includes grooves formed on the reinforcing ribs.

[0010] In one embodiment, the base has a first cavity and a second cavity that are coaxially arranged and interconnected. The diameter of the first cavity is larger than the diameter of the second cavity. The second blank is fitted with the second cavity. The groove is connected to the first cavity. The cavity also includes the first cavity.

[0011] In one embodiment, the second blank includes a first mounting ring, a second mounting ring, and winding posts. The first mounting ring forms an open cavity connecting the first cavity and the second cavity. The second mounting ring and the winding posts are multiple and correspond one-to-one. The multiple winding posts protrude from the first mounting ring and are spaced apart circumferentially along the first mounting ring. The second mounting ring is located at the end of the winding post away from the first mounting ring. The second mounting ring has a limiting surface surrounding the winding post. The strip-shaped composite material is wound around the winding post and located between the limiting surface and the first mounting ring.

[0012] In one embodiment, the base further has a stepped surface located at the junction of the first cavity and the second cavity, the stepped surface surrounding the second cavity, and the surface of the first mounting ring facing the second mounting ring is flush with the stepped surface.

[0013] In one embodiment, before the strip-shaped composite material is wound around the winding post, a through hole is provided on the second blank, the through hole simultaneously penetrating the first mounting ring, the second mounting ring, and the winding post.

[0014] In one embodiment, the orthographic projection of the second mounting ring onto the first mounting ring is a circle, and the orthographic projection of the second mounting ring is externally tangent to the inner circle of the first mounting ring and internally tangent to the outer circle of the first mounting ring.

[0015] In one embodiment, the orthographic projection of the winding post, along the radial direction of the first mounting ring, at least partially falls at the opening where the groove communicates with the first cavity.

[0016] In one embodiment, with the end of the cavity of the side cylinder away from the base as the reference end, the distance from the groove to the reference end first increases and then decreases from the end of the groove near the base to the end away from the base.

[0017] In one embodiment, the first blank includes a body portion and a plurality of protrusions. The body portion is sleeved on the tooling. The protrusions protrude from the body portion and are used to wind the strip-shaped composite material. The plurality of protrusions are spaced apart circumferentially along the body portion. Along the axial direction of the tooling, the free end of the protrusion is further away from the second blank than the fixed end of the protrusion. The same strip-shaped composite material wound on the second blank is wound with one or more of the protrusions.

[0018] One technical advantage of one embodiment of this application is that, given that one end of the strip-shaped composite material is wound around a first preform and the other end is wound around a second preform, and the strip-shaped composite material is housed in a cavity, after the strip-shaped composite material is heated and internally cured, the strip-shaped composite material is integrally molded into a connector through a winding molding process. This allows the connector to be integrally molded with the mounting base and the housing, thereby improving the connection strength between the connector and the mounting base and the housing, simplifying the assembly process between the connector and the mounting base and the housing, and ultimately reducing the manufacturing cost of composite material structural components while ensuring structural strength. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a duct provided in one embodiment.

[0020] Figure 2 for Figure 1 The diagram shows the planar structure of the culvert.

[0021] Figure 3 for Figure 1 The diagram shows the three-dimensional structure of the duct from another perspective.

[0022] Figure 4 for Figure 1 The diagram shows the exploded structure of the duct.

[0023] Figure 5 for Figure 1 The diagram shows a planar cross-sectional view of the culvert.

[0024] Figure 6 for Figure 1 The diagram shows a three-dimensional sectional view of the duct.

[0025] Figure 7 A schematic diagram of the three-dimensional structure of the tooling, the first blank, and the second blank after assembly, provided in one embodiment.

[0026] Figure 8 for Figure 7 A schematic diagram of its decomposed structure.

[0027] Figure 9 for Figure 7A schematic diagram of the three-dimensional structure from another perspective.

[0028] Figure 10 for Figure 7 A three-dimensional sectional view of the structure.

[0029] Figure 11 for Figure 7 A schematic diagram of the planar structure of the second blank.

[0030] Figure 12 for Figure 7 A perspective view of the structure when strips of composite material are wound around it.

[0031] Figure 13 A process flow diagram of a composite material structural component manufacturing process provided in one embodiment.

[0032] Reference numerals: duct 10, shell 100, accommodating cavity 110, air inlet section 111, air inlet 1111, air outlet section 112, air outlet 1121, inner shell 120, outer shell 130, outer surface 131, mounting base 200, open cavity 210, through hole 220, connector 300, tooling 400, cavity 410, side cylinder 420, base 430, first cavity 431, second cavity 432, stepped surface 433, reinforcing rib 440, groove 441, first blank 500, main body 510, protrusion 520, second blank 600, first mounting ring 610, inner circle 611, outer circle 612, second mounting ring 620, limiting surface 621, orthographic projection 622, winding column 630, strip composite material 800. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 , Figure 2 and Figure 3 This application provides an embodiment of a duct 10 for use in a drone. The duct 10 can be a composite material structure and includes a housing 100, a mounting base 200, and a connector 300. The housing 100 is annular and forms a cavity 110. An air inlet 1111 and an air outlet 1121 are formed at both ends of the cavity 110, both of which are connected to the outside. The mounting base 200 is positioned near the air outlet 1121, and its orthographic projection along the axial direction of the cavity 110 falls within the cavity 110. For example, the mounting base 200 and the housing 100 can be coaxially arranged. A propeller can be mounted on the mounting base 200 and housed within the cavity 110. When the propeller rotates, gas enters the cavity 110 from the air inlet 1111 and exits from the air outlet 1121, thus providing driving force for the movement of the entire drone. There are multiple connectors 300. The connectors 300 can be made of composite materials with carbon fiber. The connectors 300 are connected between the housing 100 and the mounting base 200. That is, one end of the connector 300 is connected to the housing 100 and the other end of the connector 300 is connected to the mounting base 200. Multiple connectors 300 are arranged at intervals along the circumference of the housing 100, and the connectors 300 are connected to the housing 100 and the mounting base 200 by an integral molding process.

[0040] If the connector 300 is physically connected to the housing 100 and the mounting base 200 through the intermediate connector 300, such as by bolting or gluing the connector 300 to the housing 100 and the mounting base 200, this will affect the connection strength between the connector 300 and the housing 100 and the mounting base 200, and will also make the assembly of the connector 300 to the housing 100 and the mounting base 200 more complicated.

[0041] Regarding the duct 10 in the above embodiments, since the connector 300 is connected to the housing 100 and the mounting base 200 through an integral molding process, this can improve the connection strength between the connector 300 and the housing 100 and the mounting base 200, thereby improving the overall structural strength of the duct 10. On the other hand, it can reduce the assembly process and manufacturing difficulty between the connector 300 and the housing 100 and the mounting base 200, thereby reducing the manufacturing cost of the duct 10.

[0042] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the distance from the connector 300 to the air inlet 1111 increases or decreases from the end where the connector 300 connects to the mounting base 200 to the other end where the connector 300 connects to the housing 100, thus making the connector 300 approximately arc-shaped. Given the certain gap between the housing 100 and the mounting base 200, when the housing 100 and the mounting base 200 are connected by the arc-shaped connector 300, the connection strength between the connector 300 and the housing 100 and the mounting base 200 can be improved to a certain extent, thereby further improving the structural strength of the entire duct 10.

[0043] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the mounting base 200 can be annular, forming an open cavity 210 with openings at both ends. Multiple through holes 220 are provided on the mounting base 200, extending axially through the mounting base 200, thus ensuring that both ends of each through hole are open. The multiple through holes 220 are spaced apart circumferentially around the open cavity 210. By providing the through holes 220, components such as motors and propellers can be easily mounted on the mounting base 200.

[0044] See Figure 4 , Figure 5 and Figure 6In some embodiments, the accommodating cavity 110 includes an inlet section 111 and an outlet section 112, which are interconnected and can be coaxially arranged. The end of the inlet section 111 furthest from the outlet section 112 forms an inlet port 1111, and the end of the outlet section 112 furthest from the inlet section 111 forms an outlet port 1121. From the end of the inlet section 111 near the outlet section 112 to the inlet port 1111, the diameter of the inlet section 111 increases, thus making it approximately funnel-shaped. Since gas enters the accommodating cavity 110 from this funnel-shaped inlet section 111, this can reduce airflow resistance to a certain extent, thereby increasing the airflow volume and thus reasonably improving the propeller's energy conversion efficiency.

[0045] In some embodiments, the diameter of the exhaust section 112 is less than or equal to the diameter of the intake section 111. Along the axial direction of the accommodating cavity 110, the length of the exhaust section 112 can be greater than the length of the intake section 111. This ensures that the exhaust section 112 has a reasonable length, allowing the intake section 111 sufficient space to accommodate the propeller and other components such as the motor that drives the propeller. The diameter of the exhaust section 112 remains constant along the axial direction of the accommodating cavity 110, which can be understood as the exhaust section 112 being approximately a columnar structure. This reasonably reduces the manufacturing difficulty of the exhaust section 112, thereby reducing the manufacturing cost of the mounting base 200 and the entire duct 10.

[0046] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the housing 100 includes an inner shell 120 and an outer shell 130, which are connected to each other. The inner shell 120 forms a receiving cavity 110, and the outer shell 130 is fitted onto the inner shell 120. By connecting the separately configured inner shell 120 and outer shell 130 to form the housing 100, the manufacturing difficulty of the housing 100 can be reduced to a certain extent, thereby reducing the overall manufacturing cost of the duct 10.

[0047] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the outer surface 131 of the housing 130 is the side surface of a table tennis table, extending along the axial direction of the accommodating cavity 110 from one end of the outer surface 131 to the other end, with the diameter of the outer surface 131 first decreasing and then increasing. Given that the outer surface 131 of the housing 130 is the side surface of a table tennis table, it can be understood that the outer surface 131 of the housing 130 is part of a sphere. During the flight of the drone, this reduces the drag generated between the outer surface 131 of the housing 130 and the air, thereby reducing the overall flight drag of the drone.

[0048] See Figure 4 , Figure 5 and Figure 6 In some embodiments, the mounting base 200 is at least partially located outside the receiving cavity 110, for example, the entire mounting base 200 may also be located outside the receiving cavity 110. Since the mounting base 200 will serve as a carrier for the motor and propeller, this can reduce or eliminate the space occupied by the mounting base 200 in the receiving cavity 110, so that the receiving cavity 110 can have a sufficiently large empty space to accommodate other components such as the motor and propeller.

[0049] This application also provides a drone, which includes a fuselage and the aforementioned duct 10. A mounting base 200 is connected to the fuselage, thereby connecting the center of the duct 10 to the fuselage. During propeller motion, the vibration of the duct 10 relative to the fuselage can be reduced, thereby improving the stability of the duct 10 during drone flight and further reducing the drag generated by the drone during flight.

[0050] See Figure 7 , Figure 8 , Figure 12 and Figure 13 This application also provides a manufacturing process for composite material structural components, which can be used to manufacture composite material structural components represented by the aforementioned duct 10. The manufacturing process mainly includes the following steps:

[0051] S710. The first blank 500 is placed on the tooling 400, and the second blank 600 is installed on the tooling 400. The tooling 400 is provided with a cavity 410.

[0052] S720, One end of the strip composite material 800 is wound around the first blank 500 and the other end is wound around the second blank 600, and the strip composite material 800 is housed in the cavity 410.

[0053] S730, The strip composite material 800 is heated and cured, and the strip composite material 800 located in the cavity 410 is transformed into a connector 300, the first blank 500 with the strip composite material 800 wound around it is transformed into an inner shell 120, and the second blank 600 with the strip composite material 800 wound around it is transformed into a mounting base 200.

[0054] S740, unload tooling 400 from inner housing 120, mounting base 200 and connector 300.

[0055] In some embodiments, the strip composite material 800 can be a material containing carbon fiber, which makes it easy to integrally form the connector 300 by a winding process. The connector 300 is then integrally formed with the mounting base 200 and the housing 100, thereby improving the connection strength between the connector 300 and the mounting base 200 and the housing 100, simplifying the assembly process between the connector 300 and the mounting base 200 and the housing 100, and ultimately reducing the manufacturing cost of composite material structural components such as the duct 10 while ensuring structural strength.

[0056] See Figure 7 , Figure 8 and Figure 9 In some embodiments, the tooling 400 includes a side cylinder 420, a base 430, and a plurality of reinforcing ribs 440. The side cylinder 420 may be generally cylindrical. The orthographic projection of the base 430 along the axial direction of the side cylinder 420 falls within the cavity enclosed by the side cylinder 420, allowing the base 430 and the side cylinder 420 to be coaxially arranged. The plurality of reinforcing ribs 440 are spaced apart circumferentially along the side cylinder 420. The reinforcing ribs 440 connect the base 430 and the side cylinder 420, that is, one end of the reinforcing rib 440 is connected to the base 430, and the other end of the reinforcing rib 440 is connected to the side cylinder 420. A groove 441 is formed on the reinforcing rib 440, and the cavity 410 includes the groove 441, such that the groove 441 is configured as part of the cavity 410. The groove 441 is a blind groove, so that the groove 441 can accommodate the strip-shaped composite material 800 to better form the connector 300 of the duct 10.

[0057] See Figure 8 , Figure 9 and Figure 10 In some embodiments, taking the end of the cavity of the side cylinder 420 away from the base 430 as the reference end, the distance from the end of the groove 441 near the base 430 to the end away from the base 430 first increases and then decreases, thus making the groove 441 approximately arc-shaped. Therefore, when the strip-shaped composite material 800 in the groove 441 solidifies to form the connector 300, the shape of the connector 300 matches the shape of the groove 441, so the formed connector 300 is also arc-shaped. This can improve the connection strength between the connector 300 and the housing 100 and the mounting base 200, thereby improving the structural strength of the entire duct 10.

[0058] See Figure 8 , Figure 9 and Figure 10In some embodiments, the base 430 has a first cavity 431 and a second cavity 432, which are coaxially arranged. The diameter of the first cavity 431 is larger than that of the second cavity 432. The groove 441 penetrates the inner wall of the first cavity 431, thereby making the groove 441 and the first cavity 431 interconnected. The cavity 410 also includes the first cavity 431, so that the first cavity 431 is also configured as part of the cavity 410. It can be understood that the strip-shaped composite material 800 located in the groove 441 can extend into the first cavity 431 to be wound on the second blank 600. The base 430 also has a stepped surface 433, which is located at the junction of the first cavity 431 and the second cavity 432. The stepped surface 433 surrounds the second cavity 432. This can be understood as the second cavity 432 being formed by a recess in the middle area of ​​the bottom wall of the first cavity 431, while the stepped surface 433 is formed on the edge area of ​​the bottom wall of the first cavity 431 where there is no recess. This allows the first cavity 431 and the second cavity 432 to together form a stepped hole. The second blank 600 mates with the second cavity 432, thus assembling the second blank 600 with the base 430.

[0059] See Figure 8 , Figure 9 and Figure 10 In some embodiments, the second blank 600 includes a first mounting ring 610, a second mounting ring 620, and a winding post 630. The cross-sectional dimensions of both the first mounting ring 610 and the second mounting ring 620 are larger than the cross-sectional dimension of the winding post 630. The first mounting ring 610 forms an open cavity 210, which connects the first cavity 431 and the second cavity 432. There are multiple second mounting rings 620 and winding posts 630, and the number of second mounting rings 620 and winding posts 630 is equal and corresponds one-to-one. Multiple winding posts 630 protrude from the first mounting ring 610 and are spaced apart circumferentially along the first mounting ring 610. The second mounting rings 620 are located at the ends of the winding posts 630 away from the first mounting ring 610, such that each winding post 630 has one second mounting ring 620. Therefore, the first mounting rings 610 and the second mounting rings 620 are spaced apart axially along the second blank 600. The second mounting ring 620 has a limiting surface 621, which surrounds the winding post 630. Specifically, the winding post 630 connects to the middle region of the surface of the second mounting ring 620 facing the first mounting ring 610, so this middle region is covered by the winding post 630. The edge region of the surface of the second mounting ring 620 facing the first mounting ring 610 is not covered by the winding post 630, thus forming the limiting surface 621. A strip of composite material 800 is wound on the winding post 630, and the strip of composite material 800 is located between the limiting surface 621 and the first mounting ring 610.

[0060] Since the strip-shaped composite material 800 is wound around the winding post 630 and fills the space between the limiting surface 621 and the first mounting ring 610, after the strip-shaped composite material 800 is cured, the second blank 600 and the strip-shaped composite material 800 wound around the winding post 630 will together transform into the aforementioned annular mounting base 200. Clearly, the strip-shaped composite material 800 located in the groove 441 and the first cavity 431 will cure to form the connector 300 of the duct 10.

[0061] See Figure 8 , Figure 9 and Figure 10 In some embodiments, the surface of the first mounting ring 610 facing the second mounting ring 620 is flush with the stepped surface 433. This allows the strip-shaped composite material 800 to smoothly enter the first cavity 431 and wrap around the winding post 630, and also allows the strip-shaped composite material 800 to fill the space between the limiting surfaces 621 of the first mounting ring 610 and the second mounting ring 620, thereby ensuring the effective forming of the mounting base 200.

[0062] See Figure 11 In some embodiments, the orthographic projection 622 of the second mounting ring 620 on the first mounting ring 610 is circular. The orthographic projection 622 of the second mounting ring 620 is externally tangent to the inner circle 611 of the first mounting ring 610, and internally tangent to the outer circle 612 of the first mounting ring 610. Therefore, when the strip-shaped composite material 800 is filled between the limiting surfaces 621 of the first mounting ring 610 and the second mounting ring 620, the second blank 600 with the strip-shaped composite material 800 wound around it can be smoothly transformed into a ring-shaped mounting base 200, thereby facilitating the effective molding of the mounting base 200.

[0063] In some embodiments, before the strip-shaped composite material 800 is wound around the winding post 630, a through hole 220 is formed on the second blank 600. The through hole 220 simultaneously passes through the first mounting ring 610, the second mounting ring 620, and the winding post 630. Therefore, when the second blank 600 with the strip-shaped composite material 800 wound around it is transformed into a ring-shaped mounting base 200, the through hole 220 is actually the through hole 220 of the mounting base 200. Obviously, the open cavity 210 of the first mounting ring 610 is also actually the open cavity 210 of the mounting base 200. Therefore, by providing the through hole 220 on the second blank 600 before the strip-shaped composite material 800 is wound, the molding difficulty of the through hole 220 can be reduced, thereby reducing the manufacturing cost of the duct 10.

[0064] See Figure 8 , Figure 9 and Figure 10In some embodiments, the orthographic projection of the winding post 630 along the radial direction of the first mounting ring 610 at least partially falls at the opening where the groove 441 communicates with the first cavity 431. In short, this ensures that the winding post 630 corresponds to the recess, creating a one-to-one correspondence between the number of winding posts 630 and grooves 441. Therefore, when the strip-shaped composite material 800 extends from the groove 441, it can extend approximately in a straight line to the winding post 630, allowing it to be smoothly wound onto the winding post 630. This reduces the difficulty of winding the strip-shaped composite material 800 onto the second blank 600, thereby reducing the manufacturing cost of the duct 10.

[0065] See Figure 8 , Figure 9 and Figure 10 In some embodiments, the first blank 500 includes a body portion 510 and a plurality of protrusions 520. The body portion 510 is sleeved on the tooling 400, and the protrusions 520 are protruding from the body portion 510 and are used to wind the strip-shaped composite material 800. The plurality of protrusions 520 are spaced apart circumferentially along the body portion 510. One end of the protrusion 520 is a fixed end fixedly connected to the body portion 510, and the other end of the protrusion 520 is a free end disposed away from the body portion 510. Along the axial direction of the tooling 400, the free end of the protrusion 520 is further away from the second blank 600 than the fixed end of the protrusion 520, which can be understood as the protrusion 520 being inclined. Therefore, by using the inclined protrusion 520, when the strip composite material 800 is wrapped around the protrusion 520, the strip composite material 800 can be made to fit tightly against the body part 510. After the first blank 500 with the strip composite material 800 wrapped around it is transformed into the inner shell 120 of the duct 10, the connection strength between the connector 300 and the inner shell 120 can be improved.

[0066] See Figure 12 In some embodiments, the same strip-shaped composite material 800 wound around the winding post 630 of the second blank 600 may be wound with one or more protrusions 520, such as Figure 12 The strip-shaped composite material 800 can be wound with three protruding strips 520. When the strip-shaped composite material 800 is wound with multiple adjacent protruding strips 520, the stress generated by the strip-shaped composite material 800 during the winding process can be effectively dispersed or even eliminated, thereby improving the connection strength between the connector 300 and the inner shell 120 and the mounting base 200.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A manufacturing process for a composite material structural component, the composite material structural component comprising an inner shell, a mounting base, and a connector, the connector being connected between the inner shell and the mounting base, characterized in that, The manufacturing method includes the following steps: The first blank is fitted onto the tooling, and the second blank is installed on the tooling, which is provided with a cavity; One end of the strip-shaped composite material is wound around the first blank and the other end is wound around the second blank, and the strip-shaped composite material is housed in the cavity; The strip-shaped composite material is heated and cured, transforming it into the connector within the cavity; the first preform wound with the strip-shaped composite material is transformed into the inner shell; and the second preform wound with the strip-shaped composite material is transformed into the mounting base. The tooling is unloaded from the inner shell, the mounting base, and the connector.

2. The manufacturing process for composite material structural components according to claim 1, characterized in that, The tooling includes a side cylinder, a base, and multiple reinforcing ribs. The orthographic projection of the base along the axial direction of the side cylinder falls within the cavity enclosed by the side cylinder. The multiple reinforcing ribs are spaced apart along the circumference of the side cylinder and are connected between the base and the side cylinder. The cavity includes grooves formed on the reinforcing ribs.

3. The manufacturing process for composite material structural components according to claim 2, characterized in that, The base has a first cavity and a second cavity that are coaxially arranged and interconnected. The diameter of the first cavity is larger than the diameter of the second cavity. The second blank is fitted with the second cavity. The groove is connected to the first cavity. The cavity also includes the first cavity.

4. The manufacturing process for composite material structural components according to claim 3, characterized in that, The second blank includes a first mounting ring, a second mounting ring, and winding posts. The first mounting ring forms an open cavity connecting the first cavity and the second cavity. The second mounting ring and the winding posts are multiple and correspond one-to-one. The multiple winding posts protrude from the first mounting ring and are spaced apart along the circumference of the first mounting ring. The second mounting ring is located at the end of the winding post away from the first mounting ring. The second mounting ring has a limiting surface surrounding the winding post. The strip-shaped composite material is wound on the winding post and located between the limiting surface and the first mounting ring.

5. The manufacturing process for composite material structural components according to claim 4, characterized in that, The base also has a stepped surface located at the junction of the first cavity and the second cavity, the stepped surface surrounding the second cavity, and the surface of the first mounting ring facing the second mounting ring being flush with the stepped surface.

6. The manufacturing process for composite material structural components according to claim 4, characterized in that, Before the strip-shaped composite material is wound around the winding column, a through hole is provided on the second blank, which simultaneously passes through the first mounting ring, the second mounting ring, and the winding column.

7. The manufacturing process for composite material structural components according to claim 4, characterized in that, The orthographic projection of the second mounting ring onto the first mounting ring is a circle. The orthographic projection of the second mounting ring is externally tangent to the inner circle of the first mounting ring and internally tangent to the outer circle of the first mounting ring.

8. The manufacturing process for composite material structural components according to claim 4, characterized in that, Along the radial direction of the first mounting ring, the orthographic projection of the winding post at least partially falls at the opening where the groove communicates with the first cavity.

9. The manufacturing process for composite material structural components according to claim 2, characterized in that, Taking the end of the cavity of the side cylinder away from the base as the reference end, the distance from the end of the groove close to the base to the end away from the base first increases and then decreases.

10. The manufacturing process for composite material structural components according to claim 1, characterized in that, The first blank includes a body portion and a plurality of protrusions. The body portion is sleeved on the tooling. The protrusions protrude from the body portion and are used to wind the strip-shaped composite material. The plurality of protrusions are spaced apart circumferentially along the body portion. Along the axial direction of the tooling, the free end of the protrusion is further away from the second blank than the fixed end of the protrusion. The same strip-shaped composite material wound on the second blank is wound with one or more of the protrusions.

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