Continuous fiber structural part comprising embedded connecting piece and manufacturing method of continuous fiber structural part

Abstract

The invention discloses a continuous fiber structural part comprising an embedded connecting piece and a manufacturing method of the continuous fiber structural part, and belongs to the technical field of additive manufacturing. A plurality of embedded parts and locking bolts are arranged in the fiber structural part; through holes are formed in the embedded parts, the outer end faces of the through holes are flush with one end of the fiber structural part, the locking bolts are inserted into the through holes from the inner end faces of the through holes, and one locking bolt is in threaded connection with one embedded part; according to the structure, the connecting piece for additive manufacturing is pre-buried in the continuous fiber additive manufacturing forming printing process, meanwhile, the reverse locking bolt is installed to conduct fiber coating on the connecting piece, the mechanical property of connection between the pre-buried connecting piece and a component is improved, and meanwhile, the mechanical connection mode of a traditional composite material structural piece is replaced.

Description

Technical Field

[0001] The present invention relates to the field of advanced manufacturing technology, and in particular to a continuous fiber structural component including a pre-embedded connecting component and a manufacturing method thereof. Background Art

[0002] The application expansion of continuous fiber composite molding structural components in high-end equipment manufacturing fields such as aviation, aerospace, transportation, sports, wind power, etc. not only reflects the progress of materials science, but also reflects the growing demand for high-performance and lightweight materials in these industries. Especially in the fields of aviation, aerospace and rail transportation, the application of continuous fiber composite materials has shown explosive growth due to the extremely high requirements for structural strength, weight control and durability.

[0003] Traditionally, the forming process of continuous fiber composites mainly relies on methods such as lamination, winding or hand lay-up, followed by curing. Although these processes are mature and widely used, they have some inherent limitations. For example, they often have difficulty in achieving direct forming of complex structures, and there is limited room for adjustment of the shape and size of the material during the post-curing process. In addition, there are also challenges in connecting continuous fiber composite structural components made by traditional forming processes. Due to the characteristics of composite materials, it is impossible to connect components through traditional metal processing techniques such as welding, but they must rely on riveting or bolting. This connection method not only increases the number of steps and costs in the manufacturing process, but may also cause stress concentration at the connection point, affecting the overall performance of the structure.

[0004] In order to overcome these limitations, 3D printing additive manufacturing technology has been introduced into the manufacture of continuous fiber composite materials. This technology can directly print out components with complex shapes by stacking materials layer by layer, greatly improving the flexibility of design and the convenience of manufacturing. During the 3D printing process, continuous fibers can be accurately embedded in the resin matrix to form composite components with excellent mechanical properties. At the same time, 3D printing technology can also achieve near-net shaping of components, reducing the need for subsequent machining, thereby reducing manufacturing costs.

[0005] More importantly, 3D printing additive manufacturing technology provides new possibilities for the connection of continuous fiber composite materials. By optimizing the printing path and the interlayer bonding method, seamless connection or integrated manufacturing between components can be achieved, avoiding the stress concentration problem caused by traditional connection methods. In addition, 3D printing technology can also realize the manufacture of functional gradient materials, that is, embedding fibers with different properties or directions in different parts of the same component to meet specific mechanical or functional requirements.

[0006] However, during the 3D printing additive manufacturing process, the connection capacity between 3D printed continuous fiber composites and connected parts is limited due to the large differences between materials. Summary of the invention

[0007] A method for additive manufacturing of a continuous fiber structure with embedded connectors is provided to solve the technical problem in the prior art that continuous fiber composite material structural components need to be connected by riveting or screwing, resulting in poor connection effects.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A continuous fiber structure including embedded connecting parts, including a fiber structure, wherein a plurality of embedded parts and locking bolts are arranged in the fiber structure; a through hole is opened in the embedded part, a connecting structure of the locking bolt is connected to an inner thread of the through hole, a length of the connecting structure is less than a length of the through hole, and a locking bolt is threadedly connected to an embedded part; The inner end surface of the locking bolt and the fiber structure are connected via a second adhesive structure, and the embedded part and the fiber structure are connected via a first adhesive structure.

[0009] A further improvement of the present invention is: Preferably, the embedded part is a cylinder, and a first concave-convex structure is provided on the outer surface of the embedded part. The first concave-convex structure and the fiber structure part are connected at their junction by resin, and the first concave-convex structure and the resin form a first bonding structure.

[0010] Preferably, the locking bolt includes a supporting structure and a connecting structure; the connecting structure is connected to the center position of the supporting structure, the connecting structure is a cylinder, and the connecting structure is perpendicular to the supporting structure; the outer surface of the connecting structure is provided with an external thread, and the connecting structure and the through hole thread cooperate.

[0011] Preferably, the support structure includes an integrally connected central portion and four support portions, the four support portions are equally distributed around the circumference of the central portion, and a second concave-convex structure is provided on the outer surface of each support portion; the second concave-convex structure is a hole structure arrayed on the outer surface of the support portion, the second concave-convex structure and the fiber structural member are connected by resin, and the second concave-convex structure and the resin constitute a second bonding structure.

[0012] Preferably, the inner surface of the support portion is provided with auxiliary support.

[0013] Preferably, the embedded part is made of metal or nylon; the locking bolt is made of metal or nylon.

[0014] A method for manufacturing a continuous fiber structural member including a pre-embedded connecting member comprises the following steps: Step 1, preparing embedded parts and locking bolts; Step 2, printing the substrate and prefabricating the embedded parts in the substrate; Step 3, printing the fiber structure, the print head prints the fiber structure layer by layer on the substrate, when the print head contacts the edge of the embedded part, heating assists to increase the power and reduce the speed of the print head, so that the junction of the melted fiber structure and the embedded part forms a first bonding structure; Step 4: Repeat step 3 until the printed fiber structure and embedded parts are flush, screw all locking bolts into the through holes of the embedded parts, tighten them, and complete the installation of all locking bolts; Step 5, the print head continues to print in layers. When the print head prints on the locking bolt, the heating assist increases the power and reduces the speed of the print head, so that a second bonding structure is formed at the junction of the molten fiber structure and the locking bolt; the print head continues to print in layers until the printing of the fiber structure is completed.

[0015] Preferably, the embedded parts and locking bolts are manufactured by SLM or SLS.

[0016] Preferably, in step 3 and step 5, the print head is reduced to 1 / 5 of the original printing speed.

[0017] Preferably, in step 4, before the locking bolt is screwed into the through hole of the embedded part, epoxy resin glue is applied to the outside of the locking bolt, and heating is used to assist in heating and softening the surrounding area of ​​the embedded part.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a continuous fiber structural part including an embedded connector, wherein a plurality of embedded parts and locking bolts are arranged in the fiber structural part; a through hole is opened in the embedded part, the outer end face of the through hole is flush with one end of the fiber structural part, the locking bolt is inserted into the through hole from the inner end face of the through hole, and a locking bolt and an embedded part are threadedly connected; the structure embeds the additively manufactured connector during the continuous fiber additive manufacturing forming and printing process, and installs a reverse locking bolt to coat the fiber, thereby improving the mechanical properties of the connection between the embedded connector and the component, and replacing the mechanical connection method of the traditional composite material structural part. This replaces the process of processing the connection hole when the continuous fiber composite material structural part is connected to other components. The invention discloses an embedded connection nut assembly made by additive manufacturing process, which increases the contact area with the resin and enhances its connection strength with the continuous carbon fiber structural part.

[0019] The present invention also discloses a method for manufacturing a continuous fiber structural part including a pre-embedded connector. In this method, the connector can be directly pre-embedded in the connection position of the molded part during the additive manufacturing molding process of the continuous fiber composite material structural part, which can replace the mechanical connection method of the continuous fiber composite material part during use, save the drilling process step, and reduce the use cost of the composite material. The method provides a process path planning and realizes the integrated production of embedded parts of continuous fiber 3D printing structural parts. The first step of the invention is to make a nut-like embedded part by additive manufacturing, lock the bolt, and then use the tool to make the internal and external threads; use pure resin to melt and extrude the printed substrate, and then plan the printing path according to the embedded part installation requirements and place the embedded parts in real time: after the substrate printing is completed, the print head performs extrusion molding 3D printing of continuous fiber reinforced resin-based composite materials, evaluate the number and distribution of embedded parts according to strength requirements, and when the print head passes through the reserved position of the embedded part, avoid the reserved position according to the set interpolation path, reduce the printing speed at this position, and laser strengthen so that the molten resin material can enter the gap outside the embedded part. When the printing height is flush with the height of the embedded part, install the locking bolt, lay it layer by layer according to the planned path planning, and do not need to interpolate to avoid the bolt installation position at the bolt installation position. After it is completely covered, continue to print to a molded part with a specific height. The present invention can save drilling operations during the use of composite materials and improve the connection strength between embedded parts and 3D printed continuous fiber structural parts by pre-embedded connectors in the continuous fiber 3D printing molding process. Therefore, combined with the flexible, fast and layer-by-layer additive manufacturing characteristics of additive manufacturing technology, the embedded connector is directly manufactured in the continuous fiber structure during the continuous fiber additive manufacturing process, which can omit the processing steps of the connection holes of the composite material structural parts and reduce the cost of using composite materials. The additive manufacturing method provides a fiber winding reinforcement method for immersing the embedded connector in the structural parts, which can improve the connection strength between the embedded connector and the structural parts, making it much greater than the strength of direct resin bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of embedded parts features; (a) is a cross-sectional view; (b) is a side view; Figure 2 Schematic diagram of locking nut features; (a) is a top view; (b) is a side view; Figure 3 This is a schematic diagram of the embedded fiber 3D printing structure; Figure 4 It is a schematic diagram of additive manufacturing of the AA section of the embedded fiber 3D printed structure; Figure 5 Flow chart of additive manufacturing of continuous fiber structural parts with embedded connectors; Among them, 1-embedded part, 1-1-internal thread, 1-2-first concave-convex structure, 1-3-through hole, 2-1-print head, 2-2-auxiliary heating, 3-locking bolt, 3-1-support structure, 3-2-second concave-convex structure, 3-3-connecting structure, 3-4-external thread, 3-5-center part, 3-6-support part, 3-7-auxiliary support, 4-substrate, 5-printing filament bundle, 6-second gluing structure, 7-first gluing structure; 8-fiber structural part. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings: Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] See also Figure 3 The present invention discloses a continuous fiber structure including embedded connectors and a manufacturing method thereof. The specific structure is that a fiber structure 8 is embedded with a plurality of embedded parts 1 for connection at the position where it needs to be connected. The embedded parts have been embedded in the preparation process of the fiber structure 8, so that the embedded parts 1 and the fiber structure 8 have good connectivity. Each embedded part 1 is strengthened with a locking nut 3 to strengthen the firmness of the connection between it and the fiber structure 8. The locking nut 3 is inside the fiber structure 8, the screw structure of the locking nut 3 is threadedly connected with the through hole inside the embedded part 1, the inner end face of the locking nut 3 and the fiber structure 8 are connected by gluing, and the side wall of the embedded part 1 and the fiber structure 8 are connected by gluing; the inner end face of the embedded part 1 is inside the fiber structure 8, and the outer end face of the embedded part 1 is flush with the outer end face of the fiber structure 8, so that the through holes 1-3 in the embedded part 1 can play the role of a connector.

[0023] See also Figure 1 The embedded part 1 is a cylinder, and a first concave-convex structure 1-2 is arranged on the surface of the cylinder. The first concave-convex structure 1-2 is a threaded structure. A through hole 1-3 is opened in the embedded part 1 along its axial direction, and an internal thread 1-1 is arranged on the hole wall of the through hole 1-3. The first concave-convex structure 1-2 is prepared in the additive manufacturing process, and the internal thread 1-1 is processed by other processes.

[0024] See also Figure 2The locking bolt 3 includes a supporting structure 3-1 and a connecting structure 3-3. The connecting structure 3-3 is a cylinder, and an external thread 3-4 is arranged on its outer surface. The supporting structure 3-1 includes a central part 3-5 and four supporting parts 3-6 connected in an integral manner. Each supporting part 3-6 is a rectangular parallelepiped structure. A second concave-convex structure 3-2 is arranged on the outer surface of each supporting part 3-6. The four supporting parts 3-6 are equally distributed around the circumference of the central part 3-5. The angle between adjacent supporting parts 3-6 is 90°. One end of each supporting part 3-6 is integrally connected to the central part 3-5. The inner surface of the supporting part 3-6 is facing the direction of the connecting structure 3-3. The inner surface of the central part 3-5 is integrally connected to one end of the connecting structure 3-3. During the manufacturing process of the locking bolt 3, the second concave-convex structure 3-2 is processed at the same time, and the external thread 3-4 is processed by other tools. The second concave-convex structure 3 - 2 is a hole structure. The second concave-convex structure 3 - 2 is a plurality of holes arrayed along the length direction and the width direction on the outer surface of the support part 3 - 6 .

[0025] See also Figure 2 In the figure (b), the inner surface of the support part 3-6 is provided with an auxiliary support 3-1, which can strengthen the connection force between the entire locking bolt 3 and the fiber on the one hand, and can be used as a criterion to judge whether the depth of the locking bolt 3 into the embedded part 1 meets the requirements during the screwing process of the locking bolt 3. It should be understood that the number of locking bolts 3 can be 1-4, that is, they can be provided on the inner surface of each support part 3-6, or only on the inner surface of 1-2 support parts 3-6, which can ensure the enhanced connection strength while reducing the resistance of the screwing process.

[0026] Through the above structure, the embedded part 1 and the locking bolt 3 can be threadedly connected through the internal thread 1-1 and the external thread 3-4 when they are inside the fiber structure 8. At the same time, the first concave-convex structure 1-2 and the molten resin form a first adhesive structure 7, which enhances the connection strength between the embedded part 1 and the entire fiber structure 8 from the lateral direction of the entire structure; the second concave-convex structure 3-2 and the molten resin form a second adhesive structure 6, which enhances the connection strength between the entire embedded structure and the entire fiber structure 8 from the inner end surface.

[0027] The length of the connection structure 3 - 3 is smaller than the length of the through hole 1 - 3 , ensuring that the through hole 3 - 3 has sufficient length to connect with the workpiece to be connected.

[0028] The continuous fiber structural parts prepared by the present invention are printed by continuous fiber reinforced resin-based composite materials, referred to as CFRPC, which is a material prepared by embedding continuous fibers as reinforcements into a resin matrix and undergoing processes such as curing. The fibers and resins used are determined according to the actual application scenarios, and the fibers are carbon fibers, glass fibers, aramid fibers, polyethylene fibers or basalt fibers. The resin matrix used is the matrix of the composite material, which plays the role of bonding the fibers and transferring the load. Commonly used resin matrices include epoxy resins, polyester resins, vinyl ester resins, etc. During the printing process, the continuous fiber reinforced resin-based composite material is melted and then printed. During the printing process, there are usually two printing channels, one outputting resin and the other outputting fibers.

[0029] See also Figure 5 , a method for additive manufacturing of a continuous fiber structural member with embedded connectors, specifically comprising the following steps: 1) Preparing embedded connectors: using additive manufacturing technology to manufacture embedded parts 1 and locking bolts 3; the specific preparation material is metal powder or nylon powder, and the specific materials used are used to manufacture embedded parts 1 and locking bolts 3 through SLM or SLS process according to actual occasions; In the step 1), the specific size parameters of the embedded part 1 and the locking bolt 3 are manufactured according to the size of the manufactured parts and the connection strength requirements.

[0030] 2) Printing substrate 4: melt and extrude substrate 4 with pure resin; plan the printing path according to the preset requirements of embedded parts 1, and preset embedded parts 1 in substrate 4 during the printing process of substrate 4. After the printing of substrate 4 is completed, all embedded parts 1 have been set in substrate 4 according to the preset path.

[0031] 3) The print head 2 - 1 starts printing the fiber structure 8 .

[0032] The print head 2-1 performs extrusion forming 3D printing of continuous fiber reinforced resin-based composite materials, and the heating assistant 2-2 melts the printed layer in front of the print head, wherein the number and distribution of embedded parts 1 are evaluated according to the component connection strength requirements. When the print head 2-1 passes through the reserved position of the embedded part 1, the reserved position is avoided according to the set interpolation path and the edge of the embedded part 1 is melted and printed closely. When the print head 2-1 moves to the reserved position of the embedded part 1, the molten resin is extruded, and the heating assistant 2-2 increases the heating power to further melt the resin around the embedded part 1, and at the same time reduces the moving speed of the print head 2-1 to 1 / 5 of the original speed, ensuring that the molten resin can enter the reserved position around the embedded part 1 and the spiral groove of the first concave-convex structure 1-2, and the molten resin and the first concave-convex structure 1-2 form a first bonding structure 7.

[0033] 4) Repeat step 3) according to the height of embedded part 1 until it reaches the same height as embedded part 1, and then apply epoxy resin glue to the external threads 3-4 of all locking bolts 3 according to the number and position of embedded parts 1 to enhance the connection between locking bolts 3 and embedded parts 1. Then screw in the internal threads 1-1 of embedded part 1 according to the required torque, and the external threads 3-4 of locking bolts 3 and the internal threads of embedded part 1 are connected in a matching manner, with one locking bolt 3 matching one embedded part 1.

[0034] The locking bolt 3 is made according to the characteristics of the embedded part 1. The length of the connection structure 3-3 of the locking bolt 3 is less than the height of the embedded part 1, so that the internal through hole of the embedded part 1 can leave enough height for connection with other parts. The thickness of the support structure 3-1 of the locking bolt 3 does not exceed the height of a printing wire bundle 5. If it is higher than the speed of the wire bundle, a larger gap will be formed, resulting in reduced connection strength. 5) After the locking bolt 3 is installed, the print head 2-1 performs extrusion molding 3D printing of continuous fiber reinforced resin-based composite materials and continuous layer printing. When the print head 2-1 passes through the reserved position of the embedded part 1, it does not need to bypass the installation position of the locking bolt 3, and directly performs layer printing. When the locking bolt 3 is at the upper position, the resin delivery is turned off, the heating auxiliary 2-2 increases the heating power, and the moving speed of the print head 2-1 is reduced to 1 / 5 of the original speed, so that the original layer resin around the locking bolt 3 is further melted into the second concave-convex structure 3-2, and at the same time, the printing layer height is reduced in the Z direction, so that the printing filament bundle 5 covers the locking bolt 3 to form a second bonding structure 6; The laying and strengthening process of the locking bolt 3 is as follows: before tightening the locking bolt 3 into the embedded part 1, the heating auxiliary 2-2 of the print head 2-1 first softens the resin layer in the area around the embedded part 1, and screws the locking bolt 3 into the embedded part 1 to ensure that the auxiliary supports 3-1 on both sides of the tightening bolt 3 are completely integrated into the printed layer, and then the print head 2-1 continues to print according to the predetermined planned path. In this process, since the locking bolt 3 is completely covered around the embedded part 1 and enters the printed part, when the locking bolt 3 is in position, the resin delivery is turned off and the fiber tow is directly delivered. The auxiliary heating 2-2 increases the heating power to further melt the original layer resin around the locking bolt 3, and reduces the print head movement speed to 1 / 5 of the original speed. The resin can enter the second concave-convex structure 3-2 to form a second bonding structure 6. At the same time, the print layer height is lowered in the Z direction to make the print tow 5 cover the locking bolt 3, and then continue to print and produce parts according to the predetermined path planning.

[0035] After the above printing is completed, when the substrate is removed by wire cutting or other methods, the redundant embedded parts are cut and removed at the same time to form the final continuous fiber structure.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0038] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous fiber structural member including a pre-embedded connector, characterized in that: The fiber structure (8) comprises a plurality of embedded parts (1) and locking bolts (3) arranged in the fiber structure (8); a through hole (1-3) is provided in the embedded part (1); a connection structure (3-3) of the locking bolt (3) is connected to an internal thread of the through hole (1-3); the length of the connection structure (3-3) is less than the length of the through hole (1-3); a locking bolt (3) is connected to an embedded part (1) by threading; The inner end surface of the locking bolt (3) and the fiber structure (8) are connected via a second adhesive structure (6), and the embedded part (1) and the fiber structure (8) are connected via a first adhesive structure (7).

2. A continuous fiber structural member comprising a pre-embedded connector according to claim 1, characterized in that: The embedded component (1) is a cylinder; the outer surface of the embedded component (1) is provided with a first concave-convex structure (1-2); the first concave-convex structure (1-2) and the fiber structure component (8) are connected at their junction by resin; the first concave-convex structure (1-2) and the resin form a first adhesive structure (7).

3. A continuous fiber structural member comprising embedded connectors according to claim 1, characterized in that: The locking bolt (3) comprises a supporting structure (3-1) and a connecting structure (3-3); the connecting structure (3-3) is connected to the center of the supporting structure (3-1), the connecting structure (3-3) is a cylinder, and the connecting structure (3-3) is perpendicular to the supporting structure (3-1); an external thread (3-4) is provided on the outer surface of the connecting structure (3-3), and the connecting structure (3-3) and the through hole (1-3) are threadedly matched.

4. A continuous fiber structural member comprising a pre-embedded connector according to claim 3, characterized in that: The support structure (3-1) comprises a central portion (3-5) and four support portions (3-6) which are connected in an integral manner; the four support portions (3-6) are equally distributed in the circumferential direction around the central portion (3-5); a second concave-convex structure (3-2) is provided on the outer surface of each support portion (3-6); the second concave-convex structure (3-2) is a hole structure arrayed on the outer surface of the support portion (3-6); the second concave-convex structure (3-2) and the fiber structure (8) are connected by resin; the second concave-convex structure (3-2) and the resin form a second bonding structure (6).

5. A continuous fiber structural member comprising embedded connectors according to claim 4, characterized in that: The inner surface of the support portion (3-6) is provided with an auxiliary support (3-1).

6. The continuous fiber structural member including embedded connectors according to claim 1, characterized in that: The embedded part (1) is made of metal or nylon; the locking bolt (3) is made of metal or nylon.

7. A method for manufacturing a continuous fiber structural member including embedded connectors according to claim 1, characterized in that: The following steps are involved: Step 1, preparing embedded parts (1) and locking bolts (3); Step 2, printing the substrate (4), and prefabricating the embedded part (1) in the substrate (4); Step 3, printing the fiber structure (8), the print head (2-1) prints the fiber structure (8) layer by layer on the substrate (4), when the print head (2-1) contacts the edge of the embedded part (1), the heating auxiliary (2-2) increases the power and reduces the speed of the print head (2-1), so that the interface between the melted fiber structure (8) and the embedded part (1) forms a first bonding structure (7); Step 4, repeat step 3 until the printed fiber structure (8) and the embedded part (1) are flush, screw all the locking bolts (3) into the through holes (1-3) of the embedded part (1) accordingly, tighten them, and complete the installation of all the locking bolts (3); Step 5, the print head (2-1) continues to print the layers. When the print head (2-1) prints onto the locking bolt (3), the heating auxiliary (2-2) increases the power and reduces the speed of the print head (2-1), so that the junction of the molten fiber structure (8) and the locking bolt (3) forms a second bonding structure (6); the print head (2-1) continues to print the layers until the printing of the fiber structure (8) is completed.

8. A method for manufacturing a continuous fiber structural member including a pre-embedded connector according to claim 7, characterized in that: The embedded part (1) and the locking bolt (3) are manufactured by SLM or SLS.

9. A method for manufacturing a continuous fiber structural member including a pre-embedded connector according to claim 7, characterized in that: In step 3 and step 5, the printing head (2-1) is reduced to 1 / 5 of the original printing speed.

10. A method for manufacturing a continuous fiber structural member including pre-embedded connectors according to claim 7, characterized in that: In step 4, before the locking bolt (3) is screwed into the through hole (1-3) of the embedded part (1), epoxy resin glue is applied to the outside of the locking bolt (3), and the surrounding area of ​​the embedded part (1) is heated and softened by heating assistance (2-2).

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