Method of laying prepreg by aid of trajectory planning software

Abstract

The invention provides a method of laying prepreg by aid of trajectory planning software. The method includes: importing a three-dimensional CAD (computer aided design) model of a lay-up surface of a mold to the trajectory planning software, performing lay-up planning according to the requirements on lay-up allowed lap / clearances and bearing, shape and the like of the lay-up surface so as to obtain the information, such as shape, size and position, of each piece of prepreg forming the lay-up surface, cutting a prepreg laminate and mold boards of corresponding shapes and sizes according to the information and the lap / clearances, placing the mold boards on the lay-up surface, determining an actual lay-up boundary, and according to the actual lay-up boundary connecting the adjacent pieces of prepreg in order and performing laying till the prepreg fully covering an area to be covered. The method has the advantages that by the application of the computer trajectory planning software in manual laying, scrap rate of the prepreg is deceased, laying is more accurate, laying performance is improved, and the laminate structure meeting the theoretical design and as high as automatically laid laminates in quality can be made.

Description

technical field [0001] The invention relates to a method for laying prepreg layers assisted by trajectory planning software, which belongs to the field of composite material prepreg molding and is suitable for manually laying prepreg layers on non-expandable curved surfaces and complex curved surfaces. Background technique [0002] Automatic placement technology can form large and complex components with high efficiency, high precision and low defects, and has been widely used in foreign aviation and aerospace fields. According to the laying surface information, the trajectory planning software for automatic laying can pre-arrange the shape, size, and position of the prepreg to be laid, and lay the layup on the laying surface in an orderly and neat manner, avoiding prepreg wrinkles pleats, reducing lay-up defects. However, limited by cost factors or the size of the placement head, the use of prepregs to form small non-developable curved and complex curved components is ...

AI Technical Summary

Problems solved by technology

[0003] When laying prepregs by hand on non-developable curved surfaces or complex curved surfaces, temporarily cutting and combining prepregs of different sizes and shapes into required layups tends to cause prepreg gaps or excessive overlap and wrinkling Defects such as pleats, which greatly affect the appearance of the laminate, the laying of subsequent layers, increase the porosity and other defects, and then reduce the mechanical properties of the cured laminate, and even cause the scrapping of components, which undoubtedly increases manufacturing. cost

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