Automatic tape-laying forming method for composite material with hollowed-out structure

Abstract

The invention relates to an automatic tape-laying forming method for a composite material with a hollowed-out structure, belonging to the field of laying and forming of composite materials. The invention is characterized by comprising the following processes: (1) designing the shape of a prepreg tape according to the shape and dimension of a product, the bandwidth of the prepreg tape and the direction of tape laying so as to further obtain a predetermined fold line path of a cutting knife; (2) precutting the prepreg tape, rolling up strip coils, wherein, the method of double layer back lining paper rolling or single layer back lining paper rolling can be employed to roll up the strip coils, and when one part of predetermined linear path of the predetermined fold line path is related to low-angle cutting, carrying out cutting by using the method of notching fold line cutting; (3) laying the cut prepreg tape on the surface of a die with the head of a laying tape so as to complete automatic tape-laying forming of the composite material with a hollowed-out structure. The invention enables basic functions of a tape-laying machine to be realized and fabrication difficulty of composite materials with a hollowed-out structure to be overcome.

Description

technical field [0001] The invention relates to a composite material automatic tape-laying forming method with a hollow structure, and belongs to the field of composite material laying and forming. Background technique [0002] With the development of the aerospace industry, advanced composite materials are more and more used in the manufacture of large components of aerospace vehicles, and automatic tape laying technology is widely used in the field of aerospace as an automatic forming technology for advanced composite materials. The traditional manual lay-up molding method improves the processing efficiency, improves the working environment and reduces the manufacturing cost. However, in existing applications, tape-laying products have relatively large limitations in shape, and more products have regular shapes and regular boundaries, and are rarely used in the molding of products with hollow structures. Among them, the more typical hollow structures are only A product wi...

AI Technical Summary

Problems solved by technology

However, in existing applications, tape laying products have relatively large limitations in shape, and more products have regular shapes and regular boundaries, and are rarely used in the molding of products with hollow structures. Among them, the more typical hollow structures are only For products with a small number of holes

If it is necessary to lay and form a product with a large number of hollow structures, the cutting workload of the cutter will be greatly increased, resulting in a decrease in the efficiency of laying and forming, especially when the one-step tape laying method is adopted

Moreover, when using the one-step tape laying method, when laying the end part of the prepreg tape with a small angle, the press shoe or roller will press to the leading edge of the next prepreg tape, and the leading edge of the prepreg tape needs to be torn off from the mold surface, and the Affect product quality and molding efficiency

In addition, when the angle between a certain section of the predetermined line trajectory and the fiber direction in the predetermined broken line trajectory is small, the movement of the cutter will cause the fibers to shift and pile up, which will cause wrinkles on the surface of the prepreg tape and affect the surface quality of the product. It also limits the shape of the laying product

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