Preparation method and mold of carbon fiber composite material hat-shaped beam for vehicle

Abstract

The invention discloses preparation method of an automotive cap-shaped beam made of carbon fiber composite materials, and a mold, and aims to solve the problems that in the compression molding of the cap-shaped beam, the strength of different positions is difficult to regulate, and reasonable strength distribution cannot be realized. The preparation method comprises a preparation method of a constant-strength cap-shaped beam, and a preparation method of a variable-strength cap-shaped beam. The preparation method comprises the following steps: laying presoaked cloth which is cut well in a lower concave die (2) according to the number of design layers; placing a flat inflatable bag (3) in the lower concave die (2), enabling the inflatable bag (3) to abut against the presoaked cloth which is put in the lower concave die (2), and laying the presoaked cloth on the upper surface of the inflatable bag (3); dividing a prepared variable-strength cap-shaped beam into n strength sections from right to left, wherein n is not smaller than 2 and not greater than 10; adding different additional materials between layers of the presoaked cloth in each strength section; mounting an upper concave die (1) on the lower concave die (2), and rising the temperature at the same time so as to perform gelation; rising the temperature at the same time so as to perform solidification; removing an air pump; taking down the upper concave die (1) and the inflatable bag (3); and removing burrs of a test beam. The invention further provides the mold.

Description

technical field [0001] The invention relates to a method for preparing a vehicle part, more specifically, the invention relates to a method for preparing a hat-shaped beam of a carbon fiber composite material for a vehicle. Background technique [0002] As a new type of composite material, carbon fiber composite material has been more and more widely used in many industries due to its excellent mechanical properties. In recent years, with the development of automobile lightweight technology, the use of composite materials has been widely used in the automobile manufacturing process. Compared with traditional metal materials and other composite materials, carbon fiber composite materials have higher specific strength, specific stiffness, and specific energy absorption, and are being widely used in the automotive industry. [0003] The hat-shaped beam is a design form commonly used in the main load-carrying beam of the car body. It has good stability and anti-collision perfor...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the problems existing in the prior art that it is difficult to effectively adjust the strength of different parts and obtain a reasonable strength distribution during the molding process of the carbon fiber composite hat beam, and to provide a carbon fiber composite hat for vehicles. Form beam preparation method and mold

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