A device and method for automatic film laying of composite material preforms

Abstract

The invention discloses a device and method for automatically laying a composite preformed body in a film-mounting manner. The device is characterized in that a supply system, a hot press roll system, a laying compression and pressure adjusting device and a conveying guide wheel are arranged on a rack. The method comprises the following steps: conveying fibers and resin films supplied by the supply system to the hot press roll system for pressing the fibers and the resin films into half prepreg tapes, conveying the half prepreg tapes to the laying compression and pressure adjusting device, enabling a laying arm of a robot to drive the rack for driving the laying compression and pressure adjusting device to lay the half prepreg tapes on a core mold, and adjusting the laying pressure and the laying path in real time as needed to obtain the preformed body. According to the device and the method, the fiber laying angle can be changed according to the needs of the laying path, the fiber-resin ratio of the composite preformed body can be accurately controlled, the subsequent processing processes of the preformed body and the material waste are reduced, the laying quality of the preformed body is high, the compatibility between the preformed body and other composite material forming process is good, and various preformed bodies with different fiber / resin systems can be formed.

Description

technical field [0001] The invention belongs to the field of resin-based composite material manufacturing, and in particular relates to a device and method for automatically laying composite material preforms in a film-sticking manner. Background technique [0002] The promotion of high-performance fiber composite materials has driven composite materials to replace original materials in more and more fields, greatly improving the performance of original components. At the same time, the molding technology of high-performance fiber composite materials is also gradually developing - from the initial miniaturization to large-scale transition, from the original simplicity to complexity. The current mature composite molding technology is based on the prepreg material, which is heated and cured after manual or automatic laying. However, for the existing prepreg tape laying technology, there are some problems in the laying process that are difficult to overcome. For example, for t...

AI Technical Summary

Problems solved by technology

However, for the existing prepreg tape laying technology, there are some problems in the laying process that are difficult to overcome. For example, for the prepreg tape material itself, the prepreg tape is composed of resin and fiber, which has a service life problem. And in order to prevent the cross-linking reaction of the prepreg tape, it needs to be stored at low temperature; during the laying process of the prepreg tape, the high viscosity of the resin will pollute the laying equipment and damage the life of the equipment, especially for the molding of the prepreg tape In general, a large autoclave is required for curing, which is not only low in molding efficiency, but also expensive in equipment; in addition, in the application of prepreg tape moldings, for components with complex structures, such as aircraft frames and automobile main structures, due to prepreg The impregnated tape is viscous during laying, and is prone to defects such as wrinkles and splicing gaps. In addition, it is difficult for the laying pressure roller to compact the prepreg tape in the part with small curvature, which seriously affects the molding quality and laying of the composite material. efficiency

[0003] In addition to the defects of preparation technology, traditional fiber composite laminates are usually prepared by laying parallel and straight fibers to form composite material stacks, and in order to simplify design and facilitate construction, 0°, ±45° and 90° are often used in engineering ° ply direction, the design freedom of composite materials is greatly restricted

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