CN107933030A - A kind of fibre reinforced composites Sandwich Plates of belt lock catch - Google Patents

Abstract

The invention discloses a kind of fibre reinforced composites Sandwich Plates of belt lock catch, including made by fibre reinforced composites sandwich plate, be preset in the sandwich plate built-in fitting, be arranged on outside the sandwich plate and with the built-in fitting be detachably connected lock base and installed in it is described lock base on lock.The present invention can be in the case where not using welding so that lock is remained to install with fibre reinforced composites sandwich plate and fixed, and ensures certain bonding strength, meets the automobile panel locking demand under different operating modes.

Description

A Fiber Reinforced Composite Sandwich Panel Structure with Locks

technical field

The invention relates to a closure with a lock, in particular to a fiber-reinforced composite material sandwich panel structure with a lock, which can be applied to engine covers, doors, tailgates, etc. closures.

Background technique

In recent years, with the gradual increase of car ownership, the resulting climate change problem has become more and more serious. Both the country and the car manufacturers have realized the importance of environmental protection and rational use of energy. For the automobile industry, especially when all countries are vigorously developing new energy vehicles, the realization of automobile lightweight has become the only way for the sustainable development of the industry. Due to its excellent comprehensive performance, carbon fiber composite materials have been placed with high expectations on the road to lightweight vehicles. Compared with the high-strength steel and aluminum alloy materials currently used in automobiles, under the same strength, the proportion of carbon fiber composite materials is lower than that of aluminum alloys, and it is much lower than that of high-strength steel. In addition to the advantages of light weight, carbon fiber composite materials also have excellent properties such as high strength, high modulus, corrosion resistance, and high temperature resistance. It can be seen that the application of carbon fiber composite materials in the automotive industry has great potential.

Although the application of carbon fiber composite materials in automobiles has broad prospects, there are still some problems to be solved at present. For example, in the manufacture of traditional automobile panels, since the material used is mainly steel, one of the connection methods between the panel and its accessories (such as buckles) is determined to be welding. However, after using fiber reinforced composite materials, the metal lock can not be welded to the carbon fiber sandwich panel, and the traditional connection method can no longer meet the needs of new applications. Therefore, it is necessary to propose a new connection and installation method between the cover and its accessories. In order to facilitate the further popularization and application of fiber reinforced composite materials in the automobile industry.

Contents of the invention

In order to overcome the disadvantage that the traditional welding technology is not suitable for connecting the fiber reinforced composite sandwich panels and their accessories, the present invention provides a fiber reinforced composite sandwich panel structure with locks, which can be welded without welding , so that the lock can still be installed and fixed with the fiber-reinforced composite sandwich panel, and ensure a certain connection strength to meet the locking requirements of automobile panels under different working conditions.

The technical solution adopted by the present invention to solve its technical problems is:

A fiber-reinforced composite sandwich panel structure with locks, comprising a sandwich panel made of fiber-reinforced composite material, a pre-embedded part preset in the sandwich panel, arranged outside the sandwich panel and connected to the pre-built The lock base that is detachably connected to the embedded part and the lock installed on the lock base.

According to the above technical solution, the embedded part is provided with a plurality of screw holes, and the locking base is fixedly installed on the embedded part through bolts arranged with the screw holes.

According to the above technical solution, the sandwich panel includes a sandwich layer and fiber layers glued to the upper and lower ends of the sandwich layer, the embedded parts are arranged in the sandwich layer, and the locking base is in contact with one of the fiber layers .

According to the above technical solution, the fiber layer is composited by carbon fiber reinforced material and epoxy resin matrix, and the sandwich core layer is made of foam plastic material.

According to the above technical solution, the thickness of the fiber layer in contact with the embedded part and the locking base is greater than the thickness of other areas.

According to the above technical solution, the fiber layer is composed of multiple layers of fiber layers, and the number of fiber layer layers in the contact area of the fiber layer with the embedded part and the locking base is greater than that in other areas.

According to the above technical solution, the upper and lower end surfaces of the embedded part are attached to the inner surface of the fiber layer respectively, and a cementing layer is arranged between the embedded part and the fiber layer.

According to the above technical solution, the contact area of the embedded part with the fiber layer at one end of the lock base is smaller than the contact area with the other fiber layer.

According to the above technical solution, the lock is a metal lock.

The beneficial effects produced by the present invention are: the present invention pre-sets the embedded parts in the fiber-reinforced composite sandwich panel, so that the embedded parts and the sandwich panel are fixed as one, and then the lock base with the lock is fixed and installed on the pre-installed Embedded parts, so as to complete the fixed connection between the lock and the fiber reinforced composite sandwich panel. When the lock is subjected to additional load, it can transmit the additional load to the entire sandwich panel through the connection relationship between the components, ensuring The reliability of the lock when in use.

The present invention achieves the installation and connection relationship between two parts made of different materials by presetting the embedded parts, so that when new composite materials are used to replace traditional steel materials to manufacture closures such as automobile covers, It can still meet the installation requirements between the closure and its accessories, and especially solves the locking problem of the automobile cover made of fiber reinforced composite materials; and the embedded part and the sandwich panel are integrally formed in the present invention, which can reduce subsequent processing procedures, and The lock and embedded parts are detachably connected, which is very convenient for the installation and replacement of the lock after the sandwich panel is formed. The invention plays a role in promoting the application of the fiber-reinforced composite material sandwich panel on the automobile cover parts, and further assists the automobile industry to improve the lightweight design level, so as to realize energy saving and emission reduction.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a top view of an embodiment of the present invention.

Fig. 2 is a sectional view along line A-A in Fig. 1 .

Fig. 3 is a side view of an embodiment of the present invention.

In the figure: 1-lock, 2-lock base, 3-bolt, 4-sandwich panel, 4.1-upper fiber layer, 4.2-sandwich layer, 4.3-lower fiber layer, 5-embedded parts, 5.1-pre- The upper end of the embedded part, 5.2- the lower end of the embedded part, and 5.3- the screw hole.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figures 1-3, a fiber-reinforced composite sandwich panel structure with locks includes a sandwich panel 4 made of fiber-reinforced composite material, a pre-embedded part 5 preset in the sandwich panel 4, and a The lock base 2 outside the interlayer board 4 and detachably connected to the embedded part 5 and the lock 1 installed on the lock base 2, wherein the lock is a metal lock.

In a preferred embodiment of the present invention, as shown in Figure 1 and Figure 2, a plurality of screw holes 5.3 are provided on the embedded part 5, and the locking base 2 is fixed and installed on the embedded part through bolts 3 configured with the screw holes. 5 on. In this way, on the one hand, it is convenient to install the sandwich panel with the lock base after forming, and on the other hand, the connection between the lock buckle and the sandwich panel is more reliable through screw connection, which is more reliable than only bonding. Ideal way to connect. In this embodiment, there are two screw holes, which are arranged symmetrically on both sides of the buckle. The lock base and the embedded parts are connected by bolts to facilitate the installation and replacement of the lock after the sandwich panel is formed.

In a preferred embodiment of the present invention, as shown in Figures 1-3, the sandwich panel 4 includes a sandwich layer 4.2 and fiber layers (upper fiber layer 4.1 and lower fiber layer 4.3) bonded to the upper and lower ends of the sandwich layer. The embedded part 5 is arranged in the sandwich layer, and the locking base 2 is in contact with one of the fiber layers (upper fiber layer 4.1). Among them, the fiber layer is composed of carbon fiber reinforced material and epoxy resin matrix. Specifically, carbon fiber is used as a reinforced material, epoxy resin is used as a matrix material, and a laminate structure is formed by curing the two. The materials used in the sandwich layer are mainly For Styrofoam. A bonding layer is provided between the fiber layer and the sandwich layer to glue the sandwich layer together with the upper fiber layer and the lower fiber layer, thereby further improving the performance of the sandwich panel.

In a preferred embodiment of the present invention, as shown in Figure 2, in order to meet the mechanical performance requirements of different regions of the sandwich panel, in the area near the contact surface between the fiber layer and the embedded part, the area near the contact surface between the fiber layer and the lock base The fiber layer is reinforced, that is, the thickness of the fiber layer in contact with the embedded parts and the lock base is greater than the thickness of other areas. Through such a structural design, the material distribution of the sandwich panel can be adapted to its stress, so that there is no In the case of excessively increasing materials and costs, better mechanical properties can be obtained. The method of unequal thickness of the fiber layer is as follows: the fiber layer is composed of multiple layers of fiber layers, and the number of fiber layer layers in the contact area between the fiber layer and the embedded part and the lock base is greater than the number of fiber layer layers in other areas.

In a preferred embodiment of the present invention, as shown in Figure 2, the upper and lower ends of the embedded part (the upper end 5.1 of the embedded part and the lower end 5.2 of the embedded part) are respectively attached to the inner surface of the fiber layer, and the arrangement of the embedded part The region does not cause a sudden change on the surface of the sandwich panel, so that on the one hand, the shape requirements of the surface of the sandwich panel can be guaranteed, and on the other hand, stress concentration in the mutation region can be avoided. There is a cementing layer between the embedded part and the fiber layer, and according to the force situation, the area of the upper and lower cementing layer is designed to be unequal. The contact area between the embedded part and the upper fiber layer is smaller than the contact area with the lower fiber layer. The embedded parts are asymmetrical in the thickness direction of the sandwich panel. This material layout not only takes into account the stress of the entire structure, but also takes into account the lightweight design requirements. Since the lock buckle is mainly affected by tension and pressure during its service life, when it is pulled, it is easy to cause the upper and lower fiber layers of the sandwich panel to peel off, so the lower end surface of the embedded part is designed to be larger, so as not to be damaged in the lock. When the buckle is pulled, it causes the fiber layer of the sandwich panel to peel off.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (9)

1. the fibre reinforced composites Sandwich Plates of a kind of belt lock catch, it is characterised in that including by fiber-reinforced composite material The sandwich plate expecting to make, the built-in fitting being preset in the sandwich plate, to be arranged on the sandwich plate outer and can with the built-in fitting The lock base of dismantling connection and the lock on the lock base.

2. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 1, it is characterised in that described pre- Embedded part is equipped with multiple screw holes, and the lock base with the bolt of the screw hole phase configuration by being fixedly mounted on built-in fitting.

3. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 1, it is characterised in that the folder Laminate includes laminboard layer and the cementing fibrous layer in the laminboard layer upper and lower ends, and the built-in fitting is arranged in laminboard layer, The lock base is contacted with one of fibrous layer.

4. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 3, it is characterised in that the fibre Dimension layer is combined by carbon fibre reinforcement and epoxy resin-base, and the laminboard layer is foamed plastics material.

5. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 3, it is characterised in that the fibre Tie up layer and built-in fitting and latch the thickness of the thickness more than other regions in base contacts region.

6. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 5, it is characterised in that the fibre Dimension layer is made of multi-layer fiber laying, and the number of plies of the fibrous layer and built-in fitting and the fiber laying in lock base contacts region is big In the number of plies of the fiber laying in other regions.

7. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 3, it is characterised in that described pre- Embedded part upper and lower ends face is bonded with the inner surface of fibrous layer respectively, and glued layer is provided between the built-in fitting and fibrous layer.

8. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 7, it is characterised in that described pre- The contact area of embedded part and the fibrous layer positioned at lock base one end is less than the contact area with another fibrous layer.

9. the fibre reinforced composites Sandwich Plates of belt lock catch according to claim 1, it is characterised in that the lock Detain as metal lock catch.