Manufacturing method of L-shaped edge composite material workpiece

Abstract

The invention discloses a manufacturing method of an L-shaped edge composite material workpiece. An equipment main body is included. An equipment groove area is arranged on the equipment main body, demolding cloth is arranged in the equipment groove area, small gas molecules generated in a blank hot press molding process are removed from the upper surface, and compressed air is adopted for stripping or adsorptive demolding. By paving the demolding cloth, the manufacturing precision of the L-shaped edge composite material workpiece is improved effectively.

Description

Technical field [0001] The invention belongs to the technical field of L-edge composite material manufacturing technology, and specifically relates to a manufacturing method of an L-edge composite material product. Background technique [0002] Composite materials are widely used in the aviation field, and the proportion of composite materials used is an important indicator to measure the advancement of aircraft. The composite parts are mostly flat, U, S, V, etc. The sharp curvature is usually rounded, and the L-shaped edge is prepared by post-processing, cutting and polishing. There is no L-shaped edge composite before. The autoclave molding method of one-time molding of parts is reported. [0003] L-shaped edges are usually used for butt joints and fits between composite parts. Most of the edge edges of composite parts are L-shaped edges. Generally, L-shaped edges are obtained through mechanical processing (such as cutting). This method is easy to cause defects such as delamina...

AI Technical Summary

Problems solved by technology

Generally, L-shaped edges are obtained by mechanical processing (such as cutting). This method is easy to cause defects such as delamination, cracking, burrs, and pits on the edge of the composite material, which seriously affects the processing accuracy of the composite material; Easy to cause damage such as overburning, mechanical properties and corrosion resistance

Therefore, it is particularly important to obtain a method for preparing L-shaped edge composite parts and avoid the performance degradation of the parts caused by post-processing.

[0004] The conventional preparation method of L-shaped edge composite parts is the resin transfer molding method. This preparation method, which relies on molds to obtain controllable dimensions, has the advantages of high precision and high surface quality of the parts, ensuring that it is not suitable for mechanical processing. L-shaped edge can be obtained; but the mold design is complicated, the cost is high and the process applicability is narrow (there are few applicable resin systems)

In the field of prepreg preparation of composite materials, this method has developed into the molding of matching mold autoclave, and is mostly used for large-scale parts with special functions such as integrity requirements. The cost of forming small and medium-sized parts is high.

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