Connecting structure of fiber resin-based prepreg and metal plate

Abstract

The utility model relates to a connecting structure of a fiber resin based prepreg and a metal plate, which comprises an adhesive film, the adhesive film is clamped between the fiber resin based prepreg and the metal plate, a plurality of guide grooves are arranged on the surface of the metal plate, a group of grooves are arranged between any two adjacent guide grooves, the grooves enable any two adjacent guide grooves to be communicated with each other, and the adhesive film is arranged on the surface of the metal plate. Any two adjacent grooves in each group of grooves are encircled to form a boss, the boss is arranged on one side facing the adhesive film, the cross section of the boss is trapezoidal, and the cross section of the groove is triangular. According to the technical scheme provided by the utility model, the crisscrossed guide grooves and grooves are formed in the surface of the metal plate, so that the contact area between the metal plate and the adhesive film and the contact area between the fiber resin-based prepreg and the adhesive film are increased, and part of the fiber resin-based prepreg and the metal plate are embedded in the metal surface; and the bonding strength between the fiber resin-based prepreg and the metal plate is enhanced under the condition that the fiber resin-based prepreg is not damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of assembly, and in particular relates to a connection structure of a fiber resin-based prepreg and a metal plate. Background Art

[0002] Carbon fiber composites (CFRPs) are considered promising lightweight materials due to their high strength, high specific modulus, excellent corrosion resistance, and designability. They are used in vehicle body panels and structural components. Components made of CFRP inevitably need to be connected to metal parts. When these components are connected, the joint area is often a weak link in the load-bearing process. Currently, the commonly used connection technologies for connecting CFRP components to metal include adhesive bonding, mechanical bonding, and hybrid bonding. Adhesive bonding is used in areas where strength requirements are low, such as vehicle body panels. However, adhesive bonding is susceptible to environmental degradation and poor peel resistance. Mechanical bonding offers higher strength and is more reliable, making it suitable for load-bearing structural components. However, this method requires drilling holes in the CFRP component, disrupting fiber continuity and thus affecting the overall performance of the component. It also tends to cause stress concentration around the holes. Existing hybrid bonding combines the advantages of both adhesive bonding and mechanical bonding. However, the use of fasteners such as rivets and bolts also requires drilling holes in the CFRP component, leading to stress concentration. Existing technologies for connecting CFRP components to metal parts have significant shortcomings.

[0003] For example, the patent document with publication number "CN110315784A" discloses a method for connecting a carbon fiber reinforced composite material part and a metal part. The steps of the method for connecting a carbon fiber reinforced composite material part and a metal part are as follows: laying a film layer on the surface of the metal part, and laying a multi-layer carbon fiber reinforced composite material prepreg layer on the film layer; each metal rod passes through the multi-layer carbon fiber reinforced composite material prepreg layer, the film layer, and the metal part respectively; the carbon fiber reinforced composite material part and the metal part structure are transferred to a forming mold for heating and curing, and the multi-layer carbon fiber reinforced composite material prepreg layer is formed into a carbon fiber reinforced composite material part after heating and curing. The above-mentioned connection structure combines the adhesive structure with the mechanical connection structure. Although it enhances the connection strength between the carbon fiber reinforced composite material and the metal part, it still needs to perforate the surface of the carbon fiber reinforced composite material component, which destroys the continuity of the carbon fiber and affects the overall performance of the carbon fiber reinforced composite material. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a connection structure between a fiber resin-based prepreg and a metal plate.

[0005] The utility model provides a connection structure between a fiber resin-based prepreg and a metal plate, comprising an adhesive film, wherein the adhesive film is sandwiched between the fiber resin-based prepreg and the metal plate, a plurality of guide grooves are provided on the surface of the metal plate, a group of grooves are provided between any two adjacent guide grooves, the grooves enable any two adjacent guide grooves to communicate with each other, a boss is formed between any two adjacent grooves in each group of grooves, the boss is provided on the side facing the adhesive film, the cross section of the boss is a trapezoid, and the cross section of the groove is a triangle.

[0006] The length direction of the guide grooves is consistent with the length direction of the metal plate, and the length directions of any two adjacent groups of guide grooves are parallel to each other.

[0007] The distance between two adjacent guide grooves is 30mm to 80mm.

[0008] Along the width direction of the metal plate, the corresponding grooves in two adjacent groups of grooves are arranged alternately with each other.

[0009] The depth of the groove is smaller than the depth of the guide groove.

[0010] The groove has a width of 30 mm to 80 mm.

[0011] The depth of the guide groove is 0.4 mm to 1.2 mm.

[0012] The ratio of the number of the grooves to the number of the guide grooves is 3:1 to 10:1.

[0013] In each group of grooves, the angle between the side surfaces of any two adjacent bosses is 45° to 60°.

[0014] The width of the boss is 60 mm to 200 mm.

[0015] The beneficial effect of the present invention is that: by adopting the technical solution provided by the present invention, crisscross guide grooves and grooves are set on the surface of the metal plate. When the fiber resin-based prepreg and the metal plate are bonded together by coating the adhesive film, the contact area between the metal plate and the adhesive film, and between the fiber resin-based prepreg and the adhesive film is increased, and part of the fiber resin-based prepreg and the metal plate are embedded in the inside of the metal surface. Without destroying the fiber resin-based prepreg component, the bonding strength between the fiber resin-based prepreg and the metal plate is enhanced, thereby avoiding damage to the carbon fibers inside the fiber resin-based prepreg. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the main view of the utility model;

[0017] Figure 2 It is an axonometric drawing of the metal plate of the present invention.

[0018] In the figure: 1-adhesive film, 2-fiber resin-based prepreg, 3-metal plate, 31-guide groove, 32-groove, 33-boss. DETAILED DESCRIPTION

[0019] The following is a further description of the technical solution of the present invention in conjunction with the accompanying drawings, but the scope of protection claimed is not limited to the above;

[0020] The utility model provides a connection structure between fiber resin-based prepreg and metal plate, such as Figures 1 to 2 As shown, the connection structure between the fiber resin-based prepreg and the metal plate includes an adhesive film 1, which is sandwiched between the fiber resin-based prepreg 2 and the metal plate 3. The surface of the metal plate 3 is provided with a plurality of guide grooves 31, and a group of grooves 32 is provided between any two adjacent guide grooves 31. The grooves 32 connect any two adjacent guide grooves 31 with each other. A boss 33 is formed between any two adjacent grooves 32 in each group of grooves 32. The boss 33 is provided on the side facing the adhesive film 1. The cross section of the boss 33 is trapezoidal, and the cross section of the groove 32 is triangular.

[0021] By adopting the technical solution provided by the present invention, crisscross guide grooves and grooves are arranged on the surface of the metal plate. When the fiber resin-based prepreg and the metal plate are bonded together by coating the adhesive film, the contact area between the metal plate and the adhesive film, and between the fiber resin-based prepreg and the adhesive film is increased, and part of the fiber resin-based prepreg and the metal plate are embedded in the inside of the metal surface. Without destroying the fiber resin-based prepreg component, the bonding strength between the fiber resin-based prepreg and the metal plate is enhanced, thereby avoiding damage to the carbon fibers inside the fiber resin-based prepreg.

[0022] Specifically, the length of the guide grooves 31 coincides with the length of the metal plate 3, and the lengths of any two adjacent groups of guide grooves 31 are parallel to each other. The spacing between adjacent guide grooves 31 is 30 mm to 80 mm. Along the width of the metal plate 3, the corresponding grooves 32 within two adjacent groups of grooves 32 are staggered. The depth of the grooves 32 is less than that of the guide grooves 31.

[0023] Preferably, the groove width of the groove 32 is 30 mm to 80 mm. The depth of the guide groove 31 is 0.4 mm to 1.2 mm. The ratio of the number of grooves 32 to the number of guide grooves 31 is 3:1 to 10:1. In each group of grooves 32, the angle between the side surfaces of any two adjacent bosses 33 is 45° to 60°. The width of the boss 33 is 60 mm to 200 mm. The number of fiber resin-based prepregs 2 is 3 to 15 layers. The adhesive film is preferably one of an epoxy resin film, a phenolic resin film, a cyanate ester film, and a bismaleimide resin film.

Claims

1. A connection structure of a fiber resin-based prepreg and a metal plate, characterized by: The invention comprises an adhesive film (1), wherein the adhesive film (1) is sandwiched between a fiber resin-based prepreg (2) and a metal plate (3), wherein a plurality of guide grooves (31) are provided on the surface of the metal plate (3), wherein a group of grooves (32) are provided between any two adjacent guide grooves (31), wherein the grooves (32) enable any two adjacent guide grooves (31) to communicate with each other, and a boss (33) is formed between any two adjacent grooves (32) in each group of grooves (32), wherein the boss (33) is provided on the side facing the adhesive film (1), wherein the cross section of the boss (33) is a trapezoid, and the cross section of the groove (32) is a triangle.

2. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 1, characterized in that: The length direction of the guide grooves (31) is consistent with the length direction of the metal plate (3), and the length directions of any two adjacent groups of guide grooves (31) are parallel to each other.

3. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 2, characterized in that: The distance between two adjacent guide grooves (31) is 30 mm to 80 mm.

4. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 1, characterized in that: Along the width direction of the metal plate (3), the corresponding grooves (32) in two adjacent groups of grooves (32) are arranged in a staggered manner.

5. A connection structure of a fiber resin-based prepreg and a metal plate according to claim 1 or 4, characterized in that: The depth of the groove (32) is smaller than the depth of the guide groove (31).

6. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 5, characterized in that: The groove (32) has a slot width of 30 mm to 80 mm.

7. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 5, characterized in that: The depth of the guide groove (31) is 0.4 mm to 1.2 mm.

8. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 5, characterized in that: The ratio of the number of the grooves (32) to the number of the guide grooves (31) is 3:1 to 10:

1.

9. The connection structure of a fiber resin-based prepreg and a metal plate according to claim 1, characterized in that: In each group of grooves (32), the angle between the side surfaces of any two adjacent bosses (33) is 45° to 60°.

10. A connection structure of a fiber resin-based prepreg and a metal plate according to claim 1 or 9, characterized in that: The width of the boss (33) is 60 mm to 200 mm.

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