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Vehicle engine hood and preparation method thereof

A hood and automobile technology, which is applied to vehicle components, superstructure, and sub-assembly of the upper structure, etc., can solve the problems of not taking into account the rigidity, deformation capacity and pedestrian protection of the hood, the complex preparation method of the hood, and the disadvantage of pedestrian protection. , to achieve the effect of good pedestrian protection, moderate stiffness and light weight

Active Publication Date: 2016-04-06
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, one of the purposes of the present invention is to provide a novel automobile hood, which solves the problems of the existing hood with high rigidity, excessive brittleness, and unfavorable pedestrian protection, and has a simple structure
[0006] Correspondingly, another object of the present invention is to provide the preparation method of the above-mentioned automobile hood, which solves the complicated preparation method of the existing hood and does not take into account the problems of hood rigidity, deformation ability and pedestrian protection

Method used

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  • Vehicle engine hood and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] see figure 1 , a car engine cover includes a carbon fiber composite material layer and a foam sandwich reinforced layer 2, the carbon fiber composite material layer includes an upper layer 1 and a lower layer 3, the foam sandwich reinforced layer 2 is arranged between the upper layer 1 and the lower layer 3, and other metal locks The accessories can be installed in the form of embedded parts (not shown in the figure). There are also three hollow areas 4 on the foam sandwich reinforced layer 2 . The hollowed out areas 4 are fan-shaped and arranged at intervals, and the three hollowed out areas 4 are arranged axially symmetrically and concentrically along the central line of the hood. By arranging the foam sandwich reinforcement layer into the above-mentioned shape, the rigidity of the engine cover is locally enhanced, and at the same time, the requirements of rigidity, deformation ability and pedestrian protection are balanced.

[0020] Both the upper layer 1 and the l...

Embodiment 2

[0022] The preparation method of automobile engine cover as described in embodiment 1, it comprises the steps:

[0023] (1) First put the prepreg of three layers of 6K tow carbon fiber twill / plain weave into the molding mold; the resin matrix of the prepreg is epoxy resin, and the reinforcing fabric is carbon fiber twill or plain weave;

[0024] (2) Then the 2mm thick foam sandwich reinforcing layer is cut into three fan-shaped hollow areas as described in Example 1, and fixed on the surface of the prepreg in step (1) with 502 quick-drying glue;

[0025] (3) Then lay the prepreg of two layers of 6K tow carbon fiber twill fabric above the foam sandwich reinforcing layer in step (2), and the laying method is preferably [±90°] 2 , that is, the angle between the two layers of fiber plies is preferably ±90°;

[0026] (4) Finally, seal the semi-finished product laid by step (3) with a vacuum bag, vacuumize it, and then heat and solidify it for molding, wherein the heating temperatu...

Embodiment 3

[0028] The preparation method of automobile engine cover as described in embodiment 1, it comprises the steps:

[0029] (1) At first the prefabricated body of three layers of 6K tow carbon fiber twill / plain weave fabric is put into forming mold; Wherein, the reinforced fabric of prefabricated body is carbon fiber twill weave or plain weave;

[0030] (2) Then the 2mm thick foam sandwich reinforcing layer is cut into three fan-shaped hollow areas as described in Example 1, and fixed on the surface of the prefabricated body in step (1);

[0031] (3) Then lay the prepreg of two layers of 6K tow carbon fiber twill fabric above the foam sandwich reinforcing layer in step (2), and the laying method is preferably [±90°] 2 , that is, the angle between the two layers of fiber plies is preferably ±90°;

[0032] (4) Close the mold, inject RTM resin, and cure and form. RTM epoxy resin is generally used, such as EPIKOTE of Momentive Company TM Resin05475, EPIKOTE TM Resin RIMR135, Hun...

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Abstract

The invention discloses a vehicle engine hood which comprises carbon fiber composite layers and a foam sandwich reinforcing layer, wherein the carbon fiber composite layers include an upper layer and a lower layer; the foam sandwich reinforcing layer is arranged between the upper layer and the lower layer; the foam sandwich reinforcing layer is provided with three fan-shaped hollow regions which are arranged at intervals, and the three hollow regions are in axial symmetry along a center line and are concentrically arranged; and the upper layer and the lower layer are made of 6K filament carbon fiber twill / plain fabric. The vehicle engine hood disclosed by the invention solves the problems of overhigh stiffness, overlarge brittleness and unfavorable pedestrian protection of the existing engine hood and has the advantages that the vehicle engine hood is lighter than an engine hood designed by the traditional composite material; the vehicle engine hood is moderate in stiffness, overcomes the defects of overhigh stiffness and overlarge brittleness of the traditional foam sandwich, and has a better pedestrian protection effect; and the vehicle engine hood is simple in molding process and is molded in one step.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to an automobile engine cover and a preparation method thereof. Background technique [0002] At present, with the improvement of emission standards and the increasing pressure of energy saving and emission reduction, domestic and foreign automakers are focusing on reducing the weight of the body, and the use of new materials is an effective weight reduction measure. High-strength materials such as a large number of aluminum alloys, high-strength steels, and carbon fiber composites are being used in the design and manufacture of automotive structures. Among them, the application of carbon fiber composite materials in automobile structures can greatly reduce the weight of the car body, and the automobile hood is an indispensable cover in the automobile structure. The traditional sheet metal structure of the automobile engine cover is formed by stamping process with two layers...

Claims

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Application Information

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IPC IPC(8): B62D25/10B29C70/44B29C70/48
Inventor 张静方舟唐少俊宣善勇张道理陈效华
Owner CHERY AUTOMOBILE CO LTD
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