Composite material connecting piece, heterogeneous material connecting piece and preparation method

Abstract

The invention discloses a composite material connecting piece, a heterogeneous material connecting piece and a preparation method, the composite material connecting piece comprises a first composite material layer, a second composite material layer and a first metal plate, the first composite material layer and the second composite material layer are stacked, and the first metal plate is arranged between the first composite material layer and the second composite material layer; the first composite material layer and the second composite material layer are correspondingly provided with at least one connecting hole, and the connecting hole extends to the first metal plate; the first metal plate is arranged between the first composite material layer and the second composite material layer, so that the connection strength between the first metal plate and the first composite material layer and the connection strength between the first metal plate and the second composite material layer are improved, and the overall reliability and stability of the composite material connecting piece are improved; and the connecting hole extending to the first metal plate is formed in the second composite material layer, so that the first metal plate and other connecting pieces are connected through the connecting hole, and the connecting strength of the composite material connecting piece and other connecting pieces is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heterogeneous material connection, and in particular to a composite material connector, a heterogeneous material connector and a preparation method thereof. Background Art

[0002] In recent years, composite materials have been widely used in aerospace, automotive, military and sports equipment engineering fields due to their high specific strength and specific stiffness, as well as good fatigue resistance and corrosion resistance. In the application process, it is inevitable to connect composite materials with other dissimilar materials, especially metal materials, to combine the advantages of each material for structural optimization design.

[0003] At present, the connection between composite materials and metal mainly includes adhesive bonding and mechanical bonding. Among them, the load-bearing capacity and connection strength of adhesive bonding are relatively low; mechanical connection can transmit a large load, but it requires adding metal plates to the composite material, and there is no stable connection between the composite material and the metal plate, resulting in low connection strength. Therefore, a structure that can improve the connection strength between composite materials and metal plates is needed. Summary of the invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a composite material connector, a heterogeneous material connector and a preparation method thereof.

[0005] According to one aspect of the present application, a composite connector is provided, comprising: a first composite layer and a second composite layer; wherein the first composite layer and the second composite layer are stacked; a first metal plate; wherein the first metal plate is arranged between the first composite layer and the second composite layer; wherein at least one first connecting hole is arranged on the first composite layer, and at least one second connecting hole is arranged on the second composite layer, the first connecting hole and the second connecting hole are arranged correspondingly, and the first connecting hole and the second connecting hole both extend to the first metal plate.

[0006] In one embodiment, the first metal plate, the first composite material layer, and the second composite material layer are integrally formed by a hot pressing process or a resin transfer molding process.

[0007] In one embodiment, the length of the first metal sheet is greater than or equal to the length of the first composite material layer and the second composite material layer.

[0008] In one embodiment, the diameter range of the first connecting hole includes 15 mm-60 mm; and / or the diameter range of the second connecting hole includes 15 mm-60 mm.

[0009] According to another aspect of the present application, a method for preparing a composite connector is provided, including: preparing a first composite material layer; wherein the first composite material layer includes at least one layer; opening at least one first connecting hole on the first composite material layer; laying a first metal plate on the first composite material layer; preparing a second composite material layer on the first metal plate; wherein the second composite material layer includes at least one layer; opening a second connecting hole on the second composite material layer corresponding to the first connecting hole; wherein the second connecting hole extends to the first metal plate.

[0010] According to another aspect of the present application, a heterogeneous material connector is provided, comprising: a first connector; wherein the first connector is a composite material connector as described in any one of the above items; and a second connector; wherein the second connector is bonded to the first connector by an adhesive film or glue.

[0011] In one embodiment, the second connecting member includes a metal material, and the second connecting member and the first metal plate are welded through the first connecting hole or the second connecting hole.

[0012] In one embodiment, a distance between the second connecting member and the first metal plate is less than 1 mm.

[0013] In one embodiment, the second connecting member comprises a composite material, a second metal sheet is disposed inside the second connecting member, and the first metal sheet and the second metal sheet are welded.

[0014] According to another aspect of the present application, a method for preparing a heterogeneous material connector is provided, comprising: preparing a first composite material layer; wherein the first composite material layer includes at least one layer; opening at least one first connecting hole on the first composite material layer; laying a first metal plate on the first composite material layer; preparing a second composite material layer on the first metal plate; wherein the second composite material layer includes at least one layer; opening a second connecting hole on the second composite material layer corresponding to the first connecting hole; wherein the second connecting hole extends to the first metal plate; preparing an adhesive layer on the second composite material layer; and arranging a second connector on the adhesive layer.

[0015] The present application provides a composite material connector, a heterogeneous material connector and a preparation method, comprising a first composite material layer, a second composite material layer and a first metal plate; wherein the first composite material layer and the second composite material layer are stacked, the first metal plate is arranged between the first composite material layer and the second composite material layer, and at least one connecting hole is correspondingly arranged on the first composite material layer and the second composite material layer, and the connecting hole extends to the first metal plate; that is, by embedding the first metal plate between the first composite material layer and the second composite material layer, the connection strength between the first metal plate and the first composite material layer and the second composite material layer is improved, so as to improve the overall reliability and stability of the composite material connector, and connecting holes extending to the first metal plate are arranged on the first composite material layer and the second composite material layer, so as to connect the first metal plate and other connectors through the connecting holes, thereby improving the connection strength between the composite material connector and other connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 It is a schematic side view of the structure of a composite material connector provided by an exemplary embodiment of the present application.

[0018] Figure 2 It is a bottom view structural schematic diagram of a composite material connector provided by an exemplary embodiment of the present application.

[0019] Figure 3 It is a schematic flow chart of a method for preparing a composite material connector provided by an exemplary embodiment of the present application.

[0020] Figure 4 It is a schematic structural diagram of a heterogeneous material connector provided by an exemplary embodiment of the present application.

[0021] Figure 5 It is a schematic flow chart of a method for preparing a heterogeneous material connector provided by an exemplary embodiment of the present application.

[0022] Explanation of the reference numerals: 10, first connecting member; 11, first composite material layer; 12, second composite material layer; 13, first metal sheet; 14, second connecting hole; 20, second connecting member; 21, second metal sheet. DETAILED DESCRIPTION

[0023] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0026] Figure 1 It is a schematic side view of the structure of a composite material connector provided by an exemplary embodiment of the present application. Figure 2 FIG. 1 is a bottom view of a composite material connector provided by an exemplary embodiment of the present application. Figure 1 and Figure 2As shown, the composite material connector includes: a first composite material layer 11, a second composite material layer 12 and a first metal plate 13; wherein the first composite material layer 11 and the second composite material layer 12 are stacked, the first metal plate 13 is arranged between the first composite material layer 11 and the second composite material layer 12, at least one first connection hole (not shown in the figure) is arranged on the first composite material layer 11, and a second connection hole 14 is arranged on the second composite material layer 12 corresponding to the first composite material layer 11, and the second connection hole 14 extends to the first metal plate 13. Since heterogeneous materials have a lower connection strength due to their different materials, the present application arranges the first metal plate 13 in the composite material connector to improve the connection strength when the composite material connector is connected with other materials (such as metal materials), but since the composite material in the composite material connector and the first metal plate 13 are of different materials. In order to ensure the connection strength between the composite material and the first metal sheet 13 in the composite material connector, the present application embeds the first metal sheet 13 between the first composite material layer 11 and the second composite material layer 12, and uses the first composite material layer 11 and the second composite material layer 12 to clamp and fix the first metal sheet 13, so as to improve the connection strength between the first metal sheet 13 and the first composite material layer 11 and the second composite material layer 12, thereby ensuring the overall strength of the composite material connector. In addition, the present application opens the first and second connection holes 14 on the first and second composite material layers 11 and 12 and extends to the first metal sheet 13 to expose the first metal sheet 13, so as to use the first and second connection holes 14 to achieve fixed connection (such as welding, riveting, etc.) between the first metal sheet 13 and other connectors without damaging the first and second composite material layers 11 and 12.

[0027] Among them, the first composite material layer 11 and the second composite material layer 12 can be a single-layer composite material or a multi-layer composite material; and the first composite material layer 11 and the second composite material layer 12 can be a combination of one or more composite materials such as carbon fiber reinforced composite materials, glass fiber reinforced composite materials, basalt fiber reinforced composite materials, etc. The first metal plate 13 can be steel, aluminum, magnesium alloy, stainless steel, etc. It should be understood that the specific materials of the first composite material layer 11, the second composite material layer 12 and the first metal plate 13 can be selected according to the needs of the actual application scenario. As long as the specific materials of the selected first composite material layer 11, the second composite material layer 12 and the first metal plate 13 meet the actual needs of the composite connector, the specific materials of the first composite material layer 11, the second composite material layer 12 and the first metal plate 13 are not limited in this application.

[0028] Preferably, the present application may open a plurality of connection holes (including the first connection hole and the second connection hole 14) on the first composite material layer 11 and the second composite material layer 12, and the plurality of connection holes may be used to realize multi-point connection between the first metal sheet 13 and other materials, thereby further strengthening the connection strength between the composite connector and other materials. It should be understood that the present application may select a specific number of connection holes according to the needs of the actual application scenario, for example, 3, and the first connection hole is set in the middle of the first metal sheet 13, and the other two connection holes are symmetrically arranged with the first connection hole as the center, as long as the specific number of connection holes selected can ensure the connection strength between the composite connector and other materials, the present application does not limit the specific number of connection holes.

[0029] The composite connector provided in the present application may be a composite connector for a car B-pillar, a composite cross beam for a car roof, a composite reinforcement for a car door sill, a composite reinforcement for a car central channel, etc.

[0030] A composite connector provided in the present application includes a first composite layer 11, a second composite layer 12 and a first metal plate 13; wherein the first composite layer 11 and the second composite layer 12 are stacked, the first metal plate 13 is arranged between the first composite layer 11 and the second composite layer 12, and at least one connecting hole is correspondingly arranged on the first composite layer 11 and the second composite layer 12, and the connecting hole extends to the first metal plate 13; that is, by embedding the first metal plate 13 between the first composite layer 11 and the second composite layer 12, the connection strength between the first metal plate 13 and the first composite layer 11 and the second composite layer 12 is improved, so as to improve the overall reliability and stability of the composite connector, and connecting holes extending to the first metal plate 13 are arranged on the first composite layer 11 and the second composite layer 12, so as to connect the first metal plate 13 and other connectors through the connecting holes, thereby improving the connection strength between the composite connector and other connectors.

[0031] In one embodiment, the first metal plate 13 and the first composite material layer 11 and the second composite material layer 12 are integrally formed by a hot pressing process or a resin transfer molding process.

[0032] The hot pressing process of composite materials is a processing technology that laminates different materials together through high temperature and high pressure, and forms a new material through chemical reaction or physical combination. Its basic principle is to combine multiple layers of composite materials together, and then perform heat curing treatment under high temperature and high pressure, so that various different materials can be combined and combined to form a high-strength, high-rigidity, and lightweight composite material. Resin Transfer Molding (RTM) is a process method that injects resin into a closed mold to infiltrate the reinforcing material and cure it. This technology does not require prepregs and autoclaves, effectively reducing equipment costs and molding costs.

[0033] In the present application, the first composite material layer 11, the second composite material layer 12 and the first metal sheet 13 are integrated into one body by a hot pressing process or a resin transfer molding process to form a high-strength, high-rigidity composite connector comprising the first composite material layer 11, the second composite material layer 12 and the first metal sheet 1.

[0034] It should be understood that the present application can select other forming methods according to the needs of the actual application scenario to achieve the integrated forming of the first composite material layer 11, the second composite material layer 12 and the first metal plate 13. As long as the selected forming method can achieve high-strength and high-rigidity integrated forming of the first composite material layer 11, the second composite material layer 12 and the first metal plate 13, the present application does not limit the specific forming method of the first composite material layer 11, the second composite material layer 12 and the first metal plate 13.

[0035] In one embodiment, the length of the first metal plate 13 is greater than or equal to the length of the first composite material layer 11 and the second composite material layer 12 .

[0036] The present application sets the length of the first metal sheet 13 to be greater than or equal to the length of the first composite material layer 11 and the second composite material layer 12 to avoid deformation of the metal sheet 13 when welded with other materials, thereby causing damage to the composite material connector. The present application can also set the length of the first metal sheet 13 to be greater than the length of the first composite material layer 11 and the second composite material layer 12, that is, the two ends of the first metal sheet 13 extend out of the first composite material layer 11 and the second composite material layer 12, so that the extended parts at both ends of the first metal sheet 13 can be fixedly connected to other components to improve the connection strength between the composite material connector and other components.

[0037] It should be understood that the present application can select the specific length of the first metal plate 13 according to the needs of the actual application scenario. For example, the first metal plate 13 can be set to extend the first composite material layer 11 and the second composite material layer 12 at both ends to a fixed size to facilitate connection with other components. As long as the specific length of the selected first metal plate 13 can ensure the stability of the composite material connector and the convenience of connection with other components, the present application does not limit the specific length of the first metal plate 13.

[0038] In one embodiment, the width of the first metal sheet 13 is smaller than the width of the first composite material layer 11 and the second composite material layer 12. The present application sets the width of the first metal sheet 13 to be smaller than the width of the first composite material layer 11 and the second composite material layer 12, so as to utilize the extended portion of the first composite material layer 11 and the second composite material layer 12 in the width direction for connection, so as to improve the connection strength of the first composite material layer 11 and the second composite material layer 12, and further improve the embedded stability of the first metal sheet 13, thereby improving the overall strength and stability of the composite material connection piece.

[0039] It should be understood that the present application can select the specific width of the first metal plate 13 according to the needs of the actual application scenario. For example, the first metal plate 13 can be set to have a fixed size shorter than the first composite material layer 11 and the second composite material layer 12 at both ends to facilitate the connection of the first composite material layer 11 and the second composite material layer 12. As long as the specific width of the selected first metal plate 13 can ensure the stability of the composite connector, the present application does not limit the specific width of the first metal plate 13.

[0040] In one embodiment, the diameter range of the first connecting hole includes 15 mm-60 mm; and / or the diameter range of the second connecting hole includes 15 mm-60 mm.

[0041] Since the first metal sheet 13 will generate a certain amount of heat when it is welded with other materials, the generated heat will have a certain impact on the surrounding composite materials. If the diameter of the connection hole is too small, the composite materials of the first composite material layer 11 and the second composite material layer 12 near the connection hole will be affected or even damaged when the first metal sheet 13 is welded with other materials. Since the first composite material layer 11 and the second composite material layer 12 are not in contact with the first metal sheet 13 at the position corresponding to the connection hole, if the diameter of the connection hole is too large, the connection strength between the first metal sheet 13 and the first composite material layer 11 and the second composite material layer 12 will be reduced, thereby affecting the overall strength and stability of the composite connector. Therefore, the present application sets the diameter range of the connector to 15 mm-60 mm to ensure the strength and stability of the composite connector.

[0042] It should be understood that the present application can select the specific diameter of the connecting hole according to the needs of the actual application scenario. As long as the selected specific diameter of the connecting hole can ensure the strength and stability of the composite material connector, the present application does not limit the specific diameter of the connecting hole.

[0043] Figure 3 FIG. 1 is a schematic diagram of a method for preparing a composite material connector provided by an exemplary embodiment of the present application. Figure 3 As shown, the preparation method of the composite material connecting piece includes the following steps: Step 310: Prepare a first composite material layer.

[0044] The first composite material layer includes at least one layer. The present application prepares the first composite material layer 11 on a preparation table. Specifically, the composite material (such as carbon fiber prepreg) is laid according to the outline of the product requirements to obtain the first composite material layer 11. The present application can obtain the first composite material layer 11 by laying it layer by layer.

[0045] Step 320: Open at least one first connection hole on the first composite material layer.

[0046] After the preparation of the first composite material layer 11 is completed, the present application opens a first connection hole on the first composite material layer 11 .

[0047] It should be understood that the present application can also directly prepare the first composite material layer 11 with the first connecting hole when preparing the first composite material layer 11, for example, placing a mask at the setting position corresponding to the first connecting hole, and preparing the first composite material layer 11 on the mask to obtain the first composite material layer 11 with the first connecting hole.

[0048] Step 330: Laying a first metal sheet on the first composite material layer.

[0049] After the first composite material layer 11 is prepared, the present application lays a first metal sheet 13 on the first composite material layer 11 to prepare the first metal sheet 13 .

[0050] Step 340: Prepare a second composite material layer on the first metal plate.

[0051] The second composite material layer includes at least one layer. After the first metal sheet 13 is prepared, the present application prepares the second composite material layer 12 on the first metal sheet 13 (on the side away from the first composite material layer 11). Specifically, the composite material (such as carbon fiber prepreg) is laid on the first metal sheet 13 according to the contour of the first composite material layer 11 to obtain the second composite material layer 12. The present application can adopt a layer-by-layer laying method to obtain the second composite material layer 12.

[0052] Step 350: Opening a second connection hole on the second composite material layer corresponding to the first connection hole.

[0053] After the second composite material layer 12 is prepared, the second connection hole 14 is opened on the second composite material layer 12 and extends to the first metal plate 13, so as to realize the connection between the first metal plate 13 and other materials by using the second connection hole 14.

[0054] It should be understood that the present application can also directly prepare the second composite material layer 12 with the second connecting hole 14 when preparing the second composite material layer 12, for example, placing a mask at the setting position of the second connecting hole 14 on the first metal plate 13, and preparing the second composite material layer 12 on the mask and the first metal plate 13 to obtain the second composite material layer 12 with the second connecting hole 14.

[0055] After preparing the second composite material layer 12 with the second connection hole 14 , the present application performs hot pressing on the first composite material layer 11 , the first metal plate 13 and the second composite material layer 12 to obtain an integrally formed composite material connector.

[0056] The present application provides a method for preparing a composite material connector, which comprises preparing a first composite material layer 11, a first metal plate 13 and a second composite material layer 12 respectively; wherein the first composite material layer 11 and the second composite material layer 12 are stacked, the first metal plate 13 is arranged between the first composite material layer 11 and the second composite material layer 12, and at least one connecting hole is correspondingly arranged on the first composite material layer 11 and the second composite material layer 12, and the connecting hole extends to the first metal plate 13; that is, by embedding the first metal plate 13 between the first composite material layer 11 and the second composite material layer 12, so as to improve the connection strength between the first metal plate 13 and the first composite material layer 11 and the second composite material layer 12, so as to improve the overall reliability and stability of the composite material connector, and correspondingly arrange connecting holes extending to the first metal plate 13 on the first composite material layer 11 and the second composite material layer 12, so as to connect the first metal plate 13 and other connectors through the connecting holes, thereby improving the connection strength between the composite material connector and other connectors.

[0057] Figure 4 Schematic diagram of the structure of a heterogeneous material connector provided by an exemplary embodiment of the present application. Figure 4 As shown, the heterogeneous material connector includes: a first connector 10 and a second connector 20; wherein the first connector 10 is a composite material connector as described above, and the second connector 20 is bonded to the first connector 10 by an adhesive film or glue.

[0058] Since the materials of the first connector 10 and the second connector 20 are usually different, the connection interface of the heterogeneous materials may peel off or generate stress due to thermal expansion and contraction when the connectors of different materials are connected, thereby reducing the connection strength between the first connector 10 and the second connector 20. The present application utilizes adhesive film or glue to bond the first connector 10 and the second connector 20 to avoid peeling of the connection interface of the first connector 10 and the second connector 20 as much as possible and reduce the generation of stress at the connection interface, thereby improving the connection strength between the first connector 10 and the second connector 20, and the adhesive film or glue can be used to achieve sealing of the connection interface of the first connector 10 and the second connector 20 to reduce the risk of metal corrosion; at the same time, the present application embeds a first metal sheet 13 between the first composite material layer 11 and the second composite material layer 12 of the first connector 10 to improve the connection strength between the first metal sheet 13 and the first composite material layer 11 and the second composite material layer 12, and correspondingly opens a first connection hole and a second connection hole 14 on the first composite material layer 11 and the second composite material layer 12 and extends to the first metal sheet 13 to expose the first metal sheet 13, so as to achieve a fixed connection (such as welding, riveting, etc.) between the first metal sheet 13 and the second connector 20 by using the connection holes, thereby further improving the connection strength between the first connector 10 and the second connector 20.

[0059] The heterogeneous material connecting parts provided in the present application include but are not limited to automobile B-pillars, automobile roof crossbeams, automobile door sill reinforcements, automobile central channel reinforcements and other parts.

[0060] The present application provides a heterogeneous material connector, including a first connector 10 and a second connector 20, wherein the first connector 10 includes a first composite material layer 11, a second composite material layer 12 and a first metal plate 13, the first composite material layer 11 and the second composite material layer 12 are stacked, the first metal plate 13 is arranged between the first composite material layer 11 and the second composite material layer 12, at least one connecting hole is correspondingly arranged on the first composite material layer 11 and the second composite material layer 12, and the connecting hole extends to the first metal plate 13, and the first connector 10 and the second connector 20 are bonded by an adhesive film or glue; that is, by embedding the first metal plate 13 in the first composite material layer 11 and the second The composite material layers 12 are provided to improve the connection strength between the first metal plate 13 and the first composite material layer 11 and the second composite material layer 12, so as to improve the overall reliability and stability of the first connecting member 10, and correspondingly connecting holes extending to the first metal plate 13 are provided on the first composite material layer 11 and the second composite material layer 12 to connect the first metal plate 13 and the second connecting member 20 through the connecting holes, thereby improving the connection strength of the first connecting member 10 and the second connecting member 20, and at the same time, the first connecting member 10 and the second connecting member 20 are bonded with adhesive film or glue to reduce the risk of peeling and stress generation at the connection interface of the first connecting member 10 and the second connecting member 20 due to thermal expansion and contraction.

[0061] In one embodiment, the second connecting member 20 includes a metal material, and the second connecting member 20 and the first metal plate 13 are welded through the connecting hole.

[0062] If the second connecting member 20 is made of metal material, the present application can utilize the first connecting hole or the second connecting hole 14 to realize welding of the first metal plate 13 and the second connecting member 20 to improve the connection strength between the first connecting member 10 and the second connecting member 20 .

[0063] It should be understood that the present application can select a specific connection method between the first metal plate 13 and the second connecting member 20 according to the needs of the actual application scenario, such as using riveting, screwing and other connection processes. As long as the selected specific connection method between the first metal plate 13 and the second connecting member 20 can ensure the connection strength between the first connecting member 10 and the second connecting member 20, the present application does not limit the specific connection method between the first metal plate 13 and the second connecting member 20.

[0064] In one embodiment, the distance between the second connecting member 20 and the first metal plate 13 is less than 1 mm.

[0065] If the distance between the second connecting member 20 and the first metal plate 13 is too large, the welding time and cost will be increased, and the welding quality will also be reduced. Therefore, the present application sets the distance between the second connecting member 20 and the first metal plate 13 to be less than 1 mm to ensure the welding effect between the second connecting member 20 and the first metal plate 13, thereby improving the connection strength between the first connecting member 10 and the second connecting member 20.

[0066] In one embodiment, the second connecting member 20 includes a composite material, a second metal plate 21 is disposed inside the second connecting member 20 , and the first metal plate 13 and the second metal plate 21 are welded.

[0067] If the second connecting member 20 is a composite material, the present application sets a second metal plate 21 in the second connecting member 20 , and improves the connection strength between the first connecting member 10 and the second connecting member 20 by welding the first metal plate 13 and the second metal plate 21 .

[0068] It should be understood that the present application can select a specific connection method between the first metal plate 13 and the second metal plate 21 according to the needs of the actual application scenario, such as using riveting, screwing and other connection processes. As long as the selected specific connection method between the first metal plate 13 and the second metal plate 21 can ensure the connection strength between the first connecting member 10 and the second connecting member 20, the present application does not limit the specific connection method between the first metal plate 13 and the second metal plate 21.

[0069] Figure 5 FIG. 1 is a flow chart of a method for preparing a heterogeneous material connector provided by an exemplary embodiment of the present application. Figure 5 As shown, the method for preparing the heterogeneous material connector includes the following steps: Step 510: Prepare a first composite material layer.

[0070] The first composite material layer includes at least one layer. This step is similar to the implementation of the above step 310 and will not be described in detail here.

[0071] Step 520: Open at least one first connection hole on the first composite material layer.

[0072] This step is similar to the implementation of step 320 above, and will not be repeated here.

[0073] Step 530: Laying a first metal sheet on the first composite material layer.

[0074] This step is similar to the implementation of step 330 above, and will not be repeated here.

[0075] Step 540: Prepare a second composite material layer on the first metal plate.

[0076] The second composite material layer includes at least one layer. This step is similar to the implementation of the above step 340 and will not be described in detail here.

[0077] Step 550: Opening a second connecting hole on the second composite material layer corresponding to the first connecting hole.

[0078] The second connection hole extends to the first metal plate. This step is similar to the implementation of the above step 350 and will not be described in detail here.

[0079] Step 560: Prepare a glue layer on the second composite material layer.

[0080] When connecting the first connecting member 10 and the second connecting member 20, the present application prepares an adhesive layer on the second composite material layer 12 of the first connecting member 10 (on the side away from the first composite material layer 11), and the adhesive layer is formed by coating the adhesive film or glue on the second composite material layer 12, thereby achieving bonding between the first connecting member 10 and the second connecting member 20.

[0081] Step 570: Dispose a second connecting member on the adhesive layer.

[0082] The present application places the second connecting member 20 on the adhesive layer to achieve bonding of the first connecting member 10 and the second connecting member 20. It should be understood that the present application connects the first metal plate 13 and the second connecting member 20 by welding or the like after bonding the first connecting member 10 and the second connecting member 20 to improve the connection strength between the first connecting member 10 and the second connecting member 20.

[0083] The present application provides a method for preparing a heterogeneous material connector, by preparing a first connector 10 and a second connector 20, wherein the first connector 10 includes a first composite material layer 11, a second composite material layer 12 and a first metal plate 13, the first composite material layer 11 and the second composite material layer 12 are stacked, the first metal plate 13 is arranged between the first composite material layer 11 and the second composite material layer 12, at least one connecting hole is correspondingly arranged on the first composite material layer 11 and the second composite material layer 12, and the connecting hole extends to the first metal plate 13, the first connector 10 and the second connector 20 are bonded by an adhesive film or glue; that is, by embedding the first metal plate 13 in the first composite material layer 11 and the second composite material layer 12 to improve the connection strength between the first metal plate 13 and the first composite material layer 11 and the second composite material layer 12 to improve the overall reliability and stability of the first connecting member 10, and correspondingly arranged connecting holes extending to the first metal plate 13 on the first composite material layer 11 and the second composite material layer 12 to connect the first metal plate 13 and the second connecting member 20 through the connecting holes, thereby improving the connection strength of the first connecting member 10 and the second connecting member 20, and at the same time, the first connecting member 10 and the second connecting member 20 are bonded with an adhesive film or glue to reduce the risk of peeling and stress generation at the connection interface of the first connecting member 10 and the second connecting member 20 due to thermal expansion and contraction.

[0084] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0085] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0086] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0087] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0088] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A composite material connector, characterized in that: include: A first composite material layer and a second composite material layer; wherein the first composite material layer and the second composite material layer are stacked; A first metal plate; wherein the first metal plate is disposed between the first composite material layer and the second composite material layer; Among them, at least one first connecting hole is set on the first composite material layer, and at least one second connecting hole is set on the second composite material layer. The first connecting hole and the second connecting hole are set correspondingly, and the first connecting hole and the second connecting hole both extend to the first metal plate.

2. The composite material connector according to claim 1, characterized in that: The first metal plate, the first composite material layer and the second composite material layer are integrally formed by a hot pressing process or a resin transfer molding process.

3. The composite material connector according to claim 1, characterized in that: The length of the first metal sheet is greater than or equal to the length of the first composite material layer and the second composite material layer.

4. The composite material connector according to claim 1, characterized in that: The diameter range of the first connecting hole includes 15 mm-60 mm; and / or the diameter range of the second connecting hole includes 15 mm-60 mm.

5. A method for preparing a composite material connector, characterized in that: include: Preparing a first composite material layer; wherein the first composite material layer comprises at least one layer; Opening at least one first connecting hole on the first composite material layer; Laying a first metal sheet on the first composite material layer; Preparing a second composite material layer on the first metal sheet; wherein the second composite material layer includes at least one layer; A second connection hole is opened on the second composite material layer corresponding to the first connection hole; wherein the second connection hole extends to the first metal plate.

6. A heterogeneous material connector, characterized in that: include: A first connecting member; wherein the first connecting member is a composite connecting member as claimed in any one of claims 1 to 4; A second connecting member; wherein the second connecting member is bonded to the first connecting member by means of an adhesive film or glue.

7. The heterogeneous material connector according to claim 6, characterized in that: The second connecting member includes a metal material, and the second connecting member is welded to the first metal plate through the first connecting hole or the second connecting hole.

8. The heterogeneous material connector according to claim 7, characterized in that: The distance between the second connecting member and the first metal plate is less than 1 mm.

9. The heterogeneous material connector according to claim 7, characterized in that: The second connecting member comprises a composite material, a second metal sheet is arranged inside the second connecting member, and the first metal sheet and the second metal sheet are welded.

10. A method for preparing a heterogeneous material connector, characterized in that: include: Preparing a first composite material layer; wherein the first composite material layer comprises at least one layer; Opening at least one first connecting hole on the first composite material layer; Laying a first metal sheet on the first composite material layer; Preparing a second composite material layer on the first metal sheet; wherein the second composite material layer includes at least one layer; A second connection hole is formed on the second composite material layer corresponding to the first connection hole; wherein the second connection hole extends to the first metal plate; preparing a glue layer on the second composite material layer; A second connecting member is arranged on the adhesive layer.

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